geyser experiments

Natural geysers form when underground chambers fill with water and are heated geothermally. When the water is heated to its boiling point, the geyser erupts, spewing its contents—and the cycle starts again.

Metal ring or Burette/retort clamp
Hot plate or other heat source
Clean, empty 2-liter plastic bottle
Glass tubing, 75 cm or shorter in length
Erlenmeyer flask
Two one-hole rubber stoppers (one to fit the Erlenmeyer flask, one to fit the 2-liter bottle)
Safety goggles
Scissors or box cutter (not shown)
Timing device such as a stopwatch or clock (not shown)
Optional: food coloring

A collection of various electronic and mechanical items, including a camera, a pair of scissors, and other unidentifiable objects.

Cut the 2-liter bottle in half. Save the top portion for this activity and discard or reserve the rest for another use.
Carefully slide the one-holed rubber stoppers onto each end of the glass tubing. ( Note: Using and manipulating glass tubing can be dangerous! Be careful when working with it. ) Position the Erlenmeyer-sized stopper so the tubing is flush with the bottom of the stopper. Position the 2-liter-bottle-sized stopper on the other end so it extends 5–10 cm past the tubing. (This stopper may be adjusted later.)
Position an unplugged hot plate next to the base of a ring stand.

Slide a metal ring or Burette/retort clamp onto the upper portion of the ring stand (don't tighten it yet). Position it above the top of the glass tubing.

Next, use the metal ring or clamp to secure the upper portion of your bottle apparatus. Note: the upper portion of your assembly needs to be well supported.
Pour cool water into the inverted top portion of the 2-liter plastic bottle. Fill the container with enough water so that the top of the glass tubing is a centimeter or two below the water's surface. Add one or two drops of food coloring if you wish.

Put your goggles on, turn on the heating element, and stand back. (It might take a while for your geyser to blow the first time—be patient.) From a safe distance, watch what happens as the water heats and boils.

After your geyser "blows," it will reset itself by drawing the cool water from the inverted bottle back into the flask. Several eruptions will occur before the water in the plastic bottle gets too hot and the temperature difference between the water in the flask and the water in the plastic bottle is not great enough to refill the system. When this happens, turn off or unplug the heating element and wait until the water in the plastic container cools. Note: It might take a few tries to find the right temperature to make the geyser blow in a repeatable cycle—too much heat and the flask will not refill; too little and the geyser will not erupt.

How many different cycles can your geyser go through?

Use your stopwatch to time and record the duration between eruptions and any other cycles you observe.

There are three main phases to this geyser's cycle: heating, erupting, and refilling. The heating time required to cause an eruption is based on two main factors: The energy output of the heat source and the length of the glass tubing. The longer the glass tube, the more pressure there is on the flask of water. The more pressure there is, the more heat is needed for the water to boil and the longer it takes for the geyser to erupt. Steam expands to over 1,700 times its volume as liquid water. (As the steam bubbles and liquid begins to rise up the tube, it reduces the pressure in the chamber below. This in turn reduces the boiling point of the water, causing a rapid conversion of liquid into steam). That's what causes the eruption you see, and launches the water out of the geyser. After the eruption slows, a small amount of cool water in the upper container will flow down into the flask, causing the steam in the tube and flask to condense. This decreases the pressure inside the apparatus, allowing the atmosphere outside to push more water down into the flask, refilling it.

Yellowstone National Park in northwestern Wyoming contains approximately 400 of the world's 700 geysers. Steamboat Geyser, located in Yellowstone's Norris Basin, is currently the world's tallest erupting geyser. Major eruptions can be over 350 feet tall.

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Soda Geyser | STEAM Experiment for Kids

by Emily | Jul 31, 2019 | STEAM Experiments , STEAM for Kids | 2 comments

Note: This post contains affiliate links. You may read my disclosure here .

My brother-in-law and his family went on an epic month-long vacation this summer along the Pacific Northwest and over to Wyoming. One of my favorite videos they sent was of their family watching the famous Old Faithful geyser in Yellowstone National Park.

It was simply spectacular, even just seeing it in photos. Nature never fails to amaze me with its power and beauty.

We are in the middle of summer break, and to be honest, there are a lot of boring days around here (we didn’t take the epic trip to see Old Faithful, but it’s definitely on my future summer dream vacation list).

I wanted to liven up our July with a few science experiments. And what better way to liven things up than with a geyser eruption at home?

Today I’m so excited to share with you how to do a soda geyser with your kids. And don’t throw the soda bottles away when you’re done with them, because we’ll use them in my next STEAM for Kids experiment where I’ll teach you how to make tornados in a bottle.

So, not only are we teaching our kids about STEAM, we are also teaching them how to be economically and environmentally responsible by reusing materials. 😉

Also, if you are like me and worried about your kids and yard getting all sticky from the soda – I have a great solution for that too! Keep reading to learn all about this fun summer activity!

First Let’s Talk About the Science

A geyser is a geological phenomenon in which a hot spring is under pressure and sends a column of boiling water and steam into the air. Geysers are extremely rare and only occur where 4 unusual conditions are met:

Hot rocks below
An ample groundwater source
A subsurface water reservoir
Fissures to deliver water to the surface

Old Faithful is the world’s most famous geyser. Located in Yellowstone National Park in Wyoming, United States, Old Faithful get’s its name from its predictable eruptions that happen around 20 times per day.

Old Faithful erupts every 60 to 110 minutes. The eruptions can last from around 1.5 to 5 minutes. The eruptions are predicted with a 90% confidence rate within a 10 minute variation based the height and duration of the previous eruption.

In fact, there is a lot of math that goes into geyser predictions. The prediction is mainly based on analyzing the statistics that have been faithfully recorded for over 100 years.

Old faithful can shoot up to 180 ft high, and expel up to 8,400 gallons of boiling (up to 204 deg F) water.

You can read more about Old Faithful on Yellowstone Park’s webpage .

A soda geyser is created by a physical reaction between carbonated soda and the mint that causes the liquid to erupt out of the bottle similar to how a geyser erupts out of the ground.

The carbonated beverages contain Carbon Dioxide (CO2). When you shake a bottle of soda before opening it, the air at the top of the bottle creates large bubbles in the liquid. These large bubbles help the CO2 escape the liquid more easily, causing a little eruption.

In this experiment we’re taking the shaken soda eruption up a notch by adding mentos instead of air bubbles. The mentos surface has lots of tiny pits. The rough surface creates nucleation sites where more CO2 bubbles can form.

Since the mint is heavy it drops to the bottom of the bottle creating lots of CO2 bubbles on the way down. The rapid nucleation of CO2 bubbles from the liquid solution results in the eruption we see in this experiment. (source Wikipedia )

Not surprisingly (after learning about geysers above), the soda geyser works best when the soda is warm. So be sure to leave your soda bottle out at room temperature, and maybe even out in the sun for the afternoon before using it for this experiment.

Soda Geyser Experiment

This is a messy, but fun experiment to try with your kids. This experiment is fun for kids aged 1+. For kids age 1 to 3 you will need to demonstrate the experiment while your children learn and observe. Let kids aged 3+ help you, and kids aged 5+ can try to do the experiment themselves!

We are creating an eruption of soda. So, be prepared for yourself and your children to potentially get soaked in minty Diet Coke. Wear clothes that are ok to get wet (such as swim or athletic wear).

Eye protection may be helpful if you think you or your children won’t move away quick enough and they have sensitive eyes.

Also, since you will be doing this experiment outdoors, remember to wear appropriate sun protection, and also properly clean up the soda with water to prevent ants and other bugs from swarming to the reaction site.

Materials Needed:

Diet Coke bottle (any size – we tried 2L, 1L and 24oz)
Plastic card (like credit card, gift card, etc)
Geyser tube (optional)
Towels (optional, but recommended)
Sprinkler (optional, but recommended)
Remove the bottle cap and set the full bottle of soda on flat ground (or a table) outside in an open location

2. Roll the paper up to a cylinder shape (it should be the same diameter to your bottle opening)

3. Place the plastic card in between the bottle opening and the paper cylinder

Note : alternatively instead of steps 2&3, you can use a geyser tube (which is much easier!)

4. Have your child count out 7 Mentos and place them into the cylinder

5. Quickly pull the plastic card out, allowing all the mentos to fall into the soda bottle and RUN!

Repeat varying number of mentos, size of bottle, and/or type of soda and record or discuss how this changes your results (see more ideas in the What Happened section below)

Once you’re all done experimenting, turn on the sprinklers. This will help wash away the sugary soda from your yard and body. My kids love any reason to run through in the sprinklers on a hot summer day. 🙂

What Happened:

According to Steve Spangler , one of the first science presenters to do this experiment on YouTube, the optimum combination to achieve the largest soda geyser is 7 Mentos in a warm (75-85 deg F) Diet Coke. I believe in experimenting to prove this yourself.

Try experimenting by testing Coke, Diet Coke and Sprite, all with same number of Mentos and temperature, what difference does type of soda make? Vary the number of Mentos: use 4, 7, and 10 in the same type of soda the same temperature. What difference does number of Mentos make for the geyser height? Try varying the temperature of the soda: use one refrigerated bottle, one at room temperature, and one that had been warmed in the sun, all in the same type of soda with same number of Mentos. How does temperature affect the geyser height?

There are so many different variations that can be done on this one experiment that make it fun for kids and adults of all ages.

Steve Spangler also invented a geyser tube that allows you to do this experiment a little easier than the rolled paper and plastic card method I used. Here is the Amazon link to the Geyser Tube attachment if you’d like easier, more consistent results.

So what are you waiting for?! Go try this fun summer experiment with your kids right now!

Have you done this experiment before? How did it turn out? What do you think of my sprinkler idea – great idea or crazy? 🙂

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Geyser Science Experiment

Brace yourself for some blast-tastic science.

This sticky science experiment creates a fab fountain that looks just like a geyser – a natural spring of water that shoots out of the earth’s surface!

Geyser science experiment

Always do this experiment outdoors and ask an adult for permission before you start.

What you’ll need…

A bottle of fizzy pop Two pieces of A4 card A tube of mints (Mentos work best)

Go into the garden, put the bottle of pop on the ground and take off the lid. Make sure there’s lots of space around!

Now, cut one of the pieces of card in half and roll it into a tube shape a little bit smaller than the neck of the bottle and secure with a small piece of tape.

Next, cut a strip about 10cm wide and 15cm long and place it over the top of the bottle. Then, hold the cardboard tube on top, making sure it’s directly above the opening of the bottle.

Unwrap the mints and carefully drop them into the tube. Now, quickly pull out the at piece of card so that all the mints drop into the bottle/fizzy pop.

How does it work?

Fizzy drinks contain a gas called carbon dioxide that has been forced into the bottle under pressure – that’s why you hear that hissing sound when you open the bottle. The carbon dioxide makes bubbles and when the mints are added they start to dissolve and release gum arabic and gelatin into the liquid. These chemicals make the bubbles expand so quickly that the liquid is forced out of the top of the bottle, making a fountain!

Like our geyser science experiment? Let us know what you think by leaving a comment, below!

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WELL DONE, YOUR COMMENT HAS BEEN ADDED!

Very cool website want to see more

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Clarks x National Geographic

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Pursuing excellence for library service to children

Geyser Science for the School-Age Crowd

November 29, 2013 at 8:10 am

Thank you for sharing! We have not done a lot of science recently as our main science guru has retired but we are getting back in to it for 2014. So a few questions – What age were the kids for your program? How many attended? How many staff did you have? Were parents present?

Amy Koester

December 2, 2013 at 10:03 am

Sarah, I advertise my school-age science programs for children in kindergarten through fifth grade. I usually have between 10 and 20 children attend, with the bulk in grades 1-3. I am the only staff person in these events, although many parents do attend with their kids and are happy to lend a hand as needed.

Let me know if you have any more questions or if I can support you as you get back into science programming!

Mentos and Coke Experiment: How-To Plus Free Worksheet

This explosive experiment teaches kids about physical reactions.

Adding Mentos candy to Coke is the stuff of legend. Every kid has heard the rumors about the explosive combination that results, but how many have actually tried it? While science teachers have been performing this experiment for years, it was first popularized in September of 2005 thanks to a viral video from Steve Spangler Science . The several-foot-high geyser that shoots from the soda bottle is a fun and awe-inspiring hands-on activity that any scientist in the making can perform. Be forewarned though: You’ll probably want to perform this experiment outside.

Read on to learn more about the Mentos and Coke experiment, and fill out the form on this page to grab your free recording sheet for the experiment.

How does the Mentos and Coke experiment work?

In this experiment, you drop Mentos mints into a 2-liter bottle of Coke. Make sure your bottle of soda is on a flat surface in a location where it is OK to make a mess. You then load the Mentos into your paper roll or geyser tube . Once the Mentos are dropped into the soda, they sink to the bottom, which causes the gas to expand and pushes the soda out of the bottle. This creates an exploding geyser effect.

What does the Mentos and Coke experiment teach?

Although you can’t see it, dissolved carbon dioxide is the invisible substance that makes soda bubbly and fizzy. As long as the soda remains in the bottle, the gas is kept in place through the pressurized conditions. When you shake a bottle of soda, some of that gas is released and the bubbles stick to nucleation sites or tiny defects on the inside of the container. If you open the shaken bottle, the bubbles will rapidly rise and push the liquid up and out of the bottle.

Aside from shaking the soda, another way to help the carbon dioxide escape is to drop an object into the bottle. Mentos are the perfect objects, since each candy has many little pits on its surface that serve as nucleation sites. Once the Mentos are dropped into the soda, the bubbles stick to those sites and quickly rise to the surface. The weight of the Mentos drives them to the bottom of the bottle. Then, the gas that is released by the Mentos forces the soda to shoot out of the bottle in a powerful geyser.

Is there a Mentos and Coke video?

This video shows how to do the Mentos and Coke experiment using just a few simple ingredients and supplies.

Materials Needed

To do the Mentos and Coke experiment, you will need:

A roll or box of mint-flavored Mentos
2-liter bottle of Coca-Cola (aka Coke)
Sheet of paper to roll into a tube OR pre-made geyser tube

Our free recording sheet is also helpful—fill out the form on this page to get it.

Mentos and Coke Experiment Steps

1. make a paper tube by taking a piece of paper and wrapping it around a roll of mentos, then taping it in place. pull the mentos out. alternatively, you can use a premade geyser tube available from amazon or other retailers..

Teacher rolling a paper tube for the Mentos and Coke experiment.

2. If using a geyser tube, load the Mentos. If using a homemade paper roll, drop the Mentos into the roll while holding the bottom closed with your finger.

Teacher putting Mentos into a paper tube for the Mentos and Coke experiment.

3. Placing a 2-liter bottle of Coke on a flat surface, remove the cap, and drop the Mentos into the open Coke bottle.

Teaching stooping outside school doing and experiment with Mentos and Coke.

Grab our free Mentos and Coke experiment worksheet!

Fill out the form on this page to get your worksheet. The worksheet asks kids to guess the correct order of the steps in the experiment. Next, kids must make a prediction about what they think will happen. They can use the provided spaces to draw what happens before and after they add the Mentos. Did their predictions come true?

Additional Reflection Questions

What happened when we added the Mentos to the Coke?
What difference do you think the temperature of the Coke makes?
What do you think would happen if we used different-flavored Mentos, like fruit?
What do you think would happen if we used a different soda other than Coke?
What do you think would happen if you use Diet Coke?

Can the Mentos and Coke experiment be used for a science fair?

Yes! If you want to do the Mentos and Coke experiment for a science fair, we recommend switching up some of the variables. For example: Does the temperature of the Coke matter? Does the brand of soda matter? Will generic soda produce the same results as the brand-name soda? What happens if you use fruit-flavored Mentos? What happens if you use Diet Coke instead of regular? Form a hypothesis about how changing the variables will impact the experiment. Good luck!

Looking for more experiment ideas? Check out our big list of experiment ideas here.

Plus, be sure to subscribe to our newsletters for more articles like this., you might also like.

Giant Bubbles Experiment: How-To Plus Free Worksheet

It'll blow everyone away! Continue Reading

Super Fun (and Explosive) Soda Pop Geyser Experiment

June 25, 2019 by OneMommy

Kids are natural scientists. From the moment they are little, sitting in the high chair and dropping their spoon over and over again, they are experimenting and learning.

As they get older it is important to keep that love of science growing, and there is no better way to do it than with fun experiments.

This soda and Mentos experiment is one that your child will beg to do over and over again. Making a soda pop geyser is one of our favorite STEM activities to do outside.

This soda pop experiment is best done outdoors, preferably in a grassy area.

You can use either regular cola or diet cola for this experiment. Diet cola is often chosen because it is less sticky and therefore easier to clean up. It also has the most explosive reaction.

The brand doesn’t matter a lot, so feel free to buy a cheaper brand, which is helpful if you want to do the experiment several times. (Trust me, your kids will want to do it several times.)

Looking for more explosive experiments? Check out how to make elephant toothpaste .

Affiliate links have been used below for your convenience. See my full disclosure for more details.

Soda and Mentos Experiment

Materials Needed:

2-liter bottle of cola
1 roll of Mentos mints

To begin the Mentos geyser science project get out 7 of the mints (half the package) and line them up so they are touching each other.

Pull off just enough tape and secure one side of the mints to the tape. This will enable you to get all the mints into the cola quickly, while still leaving enough surface area of the mints for the experiment to work. (You can also buy this special Geyser Tube to help get the Mentos in all at one time.)

Once your mints are ready, position your pop bottle firmly on the ground so it won’t tip over.

Then carefully open the bottle of soda pop. Try not to shake it, as this will reduce the effects of the experiment.

Drop the tape holding your mints into the cola and quickly back away. Watch the amazing soda pop eruption!

Why does the Mentos geyser experiment work?

Carbon dioxide is pumped into pop bottles at the factory. This is what causes bubbles to rise to the surface when you first open the soda.

Mentos candies actually have tiny pits all over the surface. These pits are the perfect place for those little carbon dioxide bubbles from the cola to collect.

Since the Mentos are heavy, they quickly sink to the bottom of the bottle. Eventually all those little air bubbles that collect on the candy work to push the cola up and out of the bottle in a dramatic way.

Extensions for the Coke and Mentos Experiment

Want to take the experiment even further?

Have your child guess how high the soda pop will erupt. Then measure to see how close they are. Mark distances with sidewalk chalk or tape on an outdoor wall and place your bottle against the wall to see how high it goes.
Determine whether temperature affects the results. Try the the soda pop experiment with a cold bottle of soda and a warm bottle. Does one react better than the other?
Experiment to find out which type of soda pop has the biggest reaction with Mentos. Try cola, diet cola, orange, and a clear soda pop.
Experiment with the candies used. Do you get a bigger reaction if you use more Mentos? What if you use a different flavor?

Making things explode is definitely one of my son’s favorite types of science experiments.

Luckily I planned ahead and had enough materials to do the soda and Mentos experiment several times. It was definitely a huge hit.

Other kids science experiments you may like:

How to Create Beautiful Egg Geodes
Amazing Rising Water Experiment
Ivory Soap Explosion
How to Make a Rubber Egg

You can find this fun experiment and many more in our co-authored book, Up!

Originally published July 25, 2016

Erin Vincent says

August 4, 2016 at 6:49 am

I’ve heard about this experiment but we’ve yet to do it. I think you’ve inspired me! This looks so fun and fascinating!

OneMommy says

September 1, 2016 at 8:26 pm

Oh, you have to give it a try! My daughter has actually done it in Girl Scouts, but I wanted to make sure her brother got to see it. He was hooked. I lost count how many times we did it.

[…] Mentos and Soda Pop Geyser […]

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Mentos Geysers

This was my favorite of our Fascinating Science for Kids experiments…although it only lasted about 20 seconds. The boys, Prince Charming, and I were all amazed with what happened when we dropped Mentos into a bottle of diet soda!

I originally found this experiment on Kitchen Pantry Scientist as well as Steve Spangler Science !

Here’s what you’ll need: a package of Mentos, a 2-liter of diet soda (dark-colored works best), tape, and a piece of construction paper (or this Steve Spangler Geyser Tube ). *Tip: Get the cheapest Diet Soda you can find!*

1. Cut your piece of construction paper in half. Begin rolling the construction paper as tightly as possible around the Mentos to make a cyclinder. Check to make sure that it is small enough to fit inside the top of your 2-liter bottle. It won’t work correctly unless the cylinder easily fits in the top of your 2-liter.

2. After you’ve made the cyclinder, unwrap the mentos and place them inside. Hold your hands over the bottom of the cylinder to keep them from falling out.

Or…if you want a sure-fire way to make it work without using the construction paper, you can buy this plastic tube created specifically for this purpose that can be reused over and over again…

3. Place the 2-liter of Diet Soda in the middle of your yard and remove the lid. Children should stand at least 15 feet away. Have an adult take the cylinder filled with unwrapped-Mentos (still holding the bottom with your hand) and quickly place it in the top of a the bottle. Run back as fast as you can…unless of course, you want a Diet Soda shower!

The cameraman (aka Prince Charming) didn’t stand far back enough to capture just how high the geyser went, but I would venture to guess it was at least 20 feet!

Investigating the bottle afterwards…we were all amazed!

The Science Behind It:

Even scientists are stumped by this phenomenon. But many speculate that when you drop the Mentos into the soda, you break the surface tension. Soda is bottled with carbon dioxide (which makes it fizz). When you drop the Mentos into the bottle, tiny bubbles form around each of the tiny indentations on the Mentos. And because the Mentos are heavy, they sink to the bottom. When all of this gas is released, it pushes all of the soda up at an incredible force!

Download your free Science eBook with this experiment and 14 others by clicking below and entering your e-mail address. You’ll immediately receive an e-mail that will have the link to the eBook! If you would rather not be an e-mail subscriber, “like” us on Facebook and then send us a private message to claim your FREE eBook.

This was definitely one of the boys' favorite experiments from our Fascinating Science for Kids…

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10 Comments

That looks like fun Jenae! :) I’m loving all the science experiments you are sharing!!

That is too cool!!

This is so cool! I remember doing this in the parking lot of the local hangout, way past closing time, lol.

Totally Awesome! This would be a great one for the summer time! I might just let my kids try to catch the geyser in their mouth and then run in the sprinkler afterward! Thanks for sharing.

haven’t done this in years. thanks for the reminder!

Wow! Looks like a fun afternoon of soda soakers. We just came across this post via Pinterest. Great job making science fun and huge thanks for sharing our link!

Thanks so much, Susan (and the entire Steve Spangler Science crew)! :)

This reaction is great! gave the kids a big surprise. But very quick.

So much fun! Not sure how much fun a soda shower would be though haha. I have featured this in our article, 7 Exploding Experiments (hope that is ok, let me know if not) You can check it out here if you like, https://www.diythought.com/7-kids-exploding-experiments/ . Thanks

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Soda and Mentos Geyser Activity

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Have you ever made a Soda and Mentos Geyser?

It’s a fun activity with a big “wow” factor, but you have to be able to move fast or you’ll shower yourself in soda!

This is a great activity to spark a discussion about chemical reactions.

Note: Find more science experiments on my Science Activities for Kids page!

Making a soda and Mentos geyser is a fun activity with a big "wow" factor, but you have to be able to move fast or you'll shower yourself in soda! Get tips to make this activity as successful as possible, and learn why it works too! || Gift of Curiosity

To make a soda and Mentos geyser, you will need the following materials:

2 liter bottle of Diet Coke
Pack of Mentos (we used mint, but any flavor should work)
Tube to hold the Mentos

Note that other soda brands will not work as well as Coke. We first tried this experiment with orange soda and the results were lackluster.

As for diet vs. regular Coke, the main benefit to using diet Coke is that it is easier to clean up as it does not have any sugar like regular soda. Diet soda uses artificial sweeteners instead of sugar, and therefore is not sticky.

One of the trickiest parts of making a successful soda and Mentos geyser is getting the tube right so that all of your Mentos will fall into the soda at the same time. You need to be sure your tube is tall enough and wide enough to fit the entire roll of Mentos. But at the same time, it should not be any wider than the mouth of your 2 L bottle.

You can make your tube out of any materials you have on hand.

For our tube, I simply folded a sheet of paper in half (“hamburger style”) and then rolled it into a tube. We checked that it was exactly the size of the opening of a 2 L bottle. Then we taped the tube together. I then checked that the Mentos fit comfortable inside.

Now, this is an experiment best done outdoors because it gets messy.

We took our supplies to the back yard and I removed the cap to the soda bottle.

I then put the Mentos into our homemade tube. I placed a finger at the bottom of the tube to ensure the Mentos wouldn’t just fall out the bottom.

Now, for the biggest eruption you want all the Mentos to fall into the soda bottle at the same time. That is why we use the tube and index card. By loading the tube with your Mentos and using the index card to time the release of the Mentos into the bottle, you can ensure you get a very tall geyser.

So I placed the index card over the top of the bottle, and set the tube on top.

I carefully lined the tube up with the opening of the bottle.

Then it was time.

I made sure the kids were back at least 10 feet.

Then holding the tube in place, I pulled the index card out, allowing the Mentos to quickly drop into the bottle.

Seriously, the eruption happened so fast. Make sure you are prepared to move quickly if you don’t want to get drenched in soda!

Once the geyser stopped flowing, we checked out the bottle. As you can see, the majority of the soda was used up during the geyser eruption.

Watch this quick video to see our Soda and Mentos Geyser in action!

The science behind the activity

Soda is made of water, a sweetener (sugar or an artificial sweetener), flavoring, preservatives, and a lot of carbon dioxide (CO 2 ) gas. It is the carbon dioxide that makes soda bubbly. The bottling factory uses high pressure to pump carbon dioxide into the bottles in such a way that it dissolves into the liquid. If you shake the bottle, some of the carbon dioxide comes out of the solution and the bubbles cling to the inside walls of the container. And when you open the bottle, the bubbles quickly rise to the top, pushing the liquid out of the way. This is what creates the “whoosh” sound when you open a bottle of soda.

As you may have experienced if you ever left an open bottle of soda sitting in the fridge for too long, carbon dioxide will continue to escape from the bottle over time, eventually leaving you with “flat” soda.

But we can speed up the rate at this the soda escapes the bottle by putting objects into the liquid soda. If you were to drop an object (like a raisin or a bean ) into the soda, you’ll quickly notice bubbles forming on the surface of the object. These are carbon dioxide bubbles that leave the soda and attach themselves to the object. This bubbling process is called “nucleation.” And the places where bubbles form – such as on the surface of a raisin or bean – are called nucleation sites.

Well it turns out that Mentos have thousands of tiny pits on their surface, creating thousands of potential nucleation sites for carbon dioxide bubbles to form. As soon as Mentos enter the soda, bubbles form all over the surface of the candy and then quickly rise to the top of the bottle.

The fact that Mentos are heavy and quickly sink to the bottom of the bottle aids in the reaction. Since the Mentos are at the bottom, carbon dioxide bubbles are largely forming at the bottom of the bottle, and they push all of the liquid up and out of the bottle as they rise to the surface.

Pretty cool, right?

More science activities for kids

More science posts from Gift of Curiosity:

Dancing raisins
Candy experiments
Jumping colors science activity
Make your own glycerin soap
Crystallized snowflakes
Dissecting an apple
Make your own telescope
Magic inflating balloons

Find more great science activities on my Science Activities for Kids page and my Science Activities Pinterest board.

How To Make A Mentos and Diet Coke Geyser

Today’s experiment was so exciting! It involves only two ingredients- mentos and diet soda! We also purchased a geyser tube that we saw on @stevespanglerscience which is so awesome in helping to store and release the mentos at a specific time for an epic explosion!

This is a really quick experiment but so fun! We bought 4 bottles of coke to use. The first time, the kids left the red caps on the geyser tube which made the opening narrower. The second time they wanted to leave one off and keep one on (which is shown in our video) to see what would happen.

So what do we need for this epic geyser experiment? Read on below!

Directions:

1️⃣ Open the mentos package and remove the cap from the geyser tube.

2️⃣ Put as many mentos into the geyser tube that will fit. Make sure the red notch is closed (pushed in) so that way the mentos does not fall out. Alternatively, you can use a regular test tube to fill with the mentos candies and use an index card to cover the opening. Make sure the candies are all laying flat.

3️⃣ Cover the geyser tube with the cap.

4️⃣ Open the soda bottle.

5️⃣ Attach your geyser tube (make sure the red notch is still pushed in). If you are using a test tube, make sure your index card is under the inverted test tube. Place and hold directly over the coke bottle opening.

6️⃣ Pull back the red notch of the geyser tube while holding the coke bottle steady. If you are using the test tube- slide out your index card. Now stand back (or run!) and watch the geyser in action!

Soda Geyser Eruption Experiment – Science for Kids

July 16, 2019 by Glitter On A Dime

Science Week started off with a blast! This is quickly becoming my favorite week of DIY Summer Camp . We kicked it off with a Soda Geyser Eruption Experiment. Have you tried this? It is so easy and the kids loved it! Like with most of our activities, it is extremely inexpensive and simple to set up.

Do your kids enjoy science? Even if they don’t, they will enjoy this. My kids love anything they can mix together or that creates a chemical reaction. That is how I knew this would be a hit.

This post does include affiliate links. That means I could earn a tiny portion of any sale that is made through clicking on any of these products with no additional cost to you. All support is greatly appreciated!

Supplies for Experiment

To create the Soda Geyser Eruption Experiment, you only need two ingredients and one supply item.

2 Liter Bottle of Soda (Regular or Diet)
Mentos Candy

I purchased the store brand soda and it worked great! At only 59 cents a bottle, I decided to buy two. We used a regular and a diet to form a hypothesis on which one would how the largest explosion.

Preparing for the Experiment

We started this experiment by placing about seven pieces of the Mentos candy on a piece of tape. You could use any tape for this part. The purpose of the tape is to make it easier for the child to drop it down into the soda bottle.

Once you have the tape of Mentos candy, it is time to take this experiment outside! Open the bottle of soda and place it on the ground. Make sure you don’t shake the bottle because it could effect the outcome of the experiment.

Once the bottle is securely on the ground, let the child drop the tape of Mentos candy into the bottle. Everyone should step back and enjoy watching this process. It doesn’t take but a second for the eruption to begin!

Experiment Success!

Once the bottle starts spewing it is amazing to watch! The picture doesn’t do it justice so I posted a video below. Are you curious which soda had a more powerful explosion? Regular or Diet? In conclusion, the regular soda was actually more explosive in our experiment.

Why does this experiment work? We knew it had something to do with the carbonation in the soda bottle. For the full explanation on this reaction, we read about it on Compound Interest . They give a very thorough answer with great visuals.

I thoroughly enjoy finding fun activities like this one to do with the kids. I want them to continue to be explorers and enjoy learning and experiencing new things. The best part of doing a little experiment like this is watching their minds expand right in front of you eyes!

Once we finished the Soda Geyser, they continued to discover and explore in the backyard. They added dirt, rocks, little pine cones, and sticks to the bottle of leftover soda. Of course there wasn’t any sort of chemical reaction but it was still fun!

Once we were back inside later working on another experiment, Gavin asked me what would happen if we put the Mentos into vinegar. We enjoy the reaction of baking soda and vinegar and I think he wondered if it would do the same thing. So I let him drop some candy into a cup of vinegar. Again, there was no reaction but now we know!

Soda Geyser Eruption Experiment - Science for Kids

Explosive Science Experiments for Kids

March 20, 2023 By Emma Vanstone Leave a Comment

Is there anything more fun than an explosive science experiment ? This collection of explosive, fizzy and sometimes messy science activities is sure to appeal to even the most reluctant little scientist s, and the kids who love science already will REALLY enjoy erupting volcanoes, launching rockets and generally just doing awesome science at home.

Exploding science experiments

Erupting soda geyser.

The most well known explosive experiment is probably the infamous coke and mentos eruption ! This science experiment is a must-try for everyone and always leads to shrieks of joy as the geyser of coke shoots into the air.

My top tip is to add the mentos as quickly as possible. If you’re struggling to get it to work well, try the extreme geyser tube from Steve Spangler.

Exploding watermelon

123 Homeschool 4 Me has a fantastic exploding watermelon , which looks impressive, but do take care, as it will explode with a bang!

Film canister rocket

Film canister rockets are always fun, but they fly quickly, so stand back immediately. Before starting, it’s a good idea to use chalk to mark out a safe observation area on the ground and ask an adult to add the ingredients to the canister and place it on the ground.

Experiment with different combinations of vinegar and baking soda to make this an investigation.

Film Canister rocket - explosive science for kids

Elephant Toothpaste

Another fun, explosive science experiment to try with kids is making elephant toothpaste . It’s a big reaction that looks amazing! We wouldn’t recommend going for the elephant toothpaste world record , though.

Children and a teacher watching an elephants toothpaste experiment in a classroom.

To kick the fun up a notch, instead of a single colour elephant toothpaste, try a rainbow toothpaste explosion ! Talk about an amazing visual effect!

Water bottle popper

If you are short on materials, you can set up an explosive science experiment with a single water bottle to make the bottle cap pop out from the bottle.

Exploding lolly sticks

A popsicle stick chain reaction is one of the best exploding science experiments. All you need are craft sticks or popsicle sticks, and the explosion is incredible, although setting it up does take a bit of patience.

craft stick chain reaction with coloured pom poms on top

Baking soda potions

Erupting potions in a test tube or beaker made with baking soda and vinegar is always fun! We like to make witchy potions for Halloween , love potions for Valentine’s Day and fairy potions for any time of year.

Splatter patterns

Experiment with water balloons or balloons filled with paint and create different patterns. Watching the splatter patterns change depending on where you drop them from is great fun and a fab science investigation for kids.

Erupting soap

Erupting soap is yet another classic and well known explosive science experiment to add to the list! This is also one of those rare experiments with a single ingredient – ivory soap!

Similar to erupting soap, exploding peep geysers also need a microwave. We love a little twist with ghost peeps, and it would make this experiment perfect for trying around Halloween. If you don’t have peeps where you are, an ordinary marshmallow will work just as well.

Erupting baking soda volcano

A simple tweak can turn an ordinary erupting volcano experiment into a fun multicoloured volcano ! Let kids make their own volcano from scratch to extend the activity further.

Another spin on a classic volcano science experiment is an ice volcano . These are perfect for bringing outside on a hot summer day!

Let us know if you have any ideas for more explosive experiments, we can try!

Don’t forget I have 100s more fun, exciting and FREE science experiments for kids to try too, so if you don’t fancy any of these, do take a look around, and hopefully, one of my other experiments will be what you’re looking for.

Awesome explosive science experiments for kids. Splatter patterns, volcanoes, film canisters and exploding sandwich bags

Last Updated on June 10, 2024 by Emma Vanstone

Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

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Steve Spangler Science Extreme Geyser Tube - Science Kit for Kids - Mentos & Soda Lab Experiment - Includes Tube, Candy, & Unique Spray Caps - Chemistry Magic - Classroom STEM Project

Extreme geyser tube.

Geyser Tube

Grab A Soda Then Prepare For The Show: This Extreme science set has everything you need except the 2-liter soda! It includes a uniquely crafted geyser tube, Mentos candies, and 3 cap variations to experiment with different mesmerizing eruption styles: Turbo cap for runaway flow; Triple cap for fountain flow; and Soaker cap for fan flow. Try them all!
Combining Critical Thinking & Creativity: While your students or children are watching in awe, they’re also using their curious minds to figure out complex questions like, “How and why do these ingredients react like this?” They can try different approaches in creative ways to observe fascinating outcomes. Sounds like a real blast—and it IS!
Try It At School, Home, & Parties: If you’re a teacher or have kids at home, the Steve Spangler Science Extreme Geyser Tube is a must-have learning tool. Birthday parties get a thrilling boost when you include it as a group activity or a special gift-bag treat. It’s sure to become the kids’ favorite science experiment kit.
Enhanced Engineering: You’ve seen videos of novice experiments using similar ingredients, and they may have created messy results. Get the ideal rocket launch every time with our brilliantly designed trigger mechanisms. They ensure you don’t get soaked because the double-pull pin and tight seal deliver up to a 30-foot geyser that’s sleek & perfectly timed.
Encourages STEM & STEAM Learning: Projects that focus on Science, Technology, Engineering, Art, and Math concepts create a dream team for eager young brains. Steve Spangler Science is passionate about helping girls and boys explore, gain insight, and build confidence in their skills & knowledge around these important subjects.

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Product details

Product Dimensions ‏ : ‎ 10 x 2 x 2.7 inches; 1.32 ounces
Manufacturer recommended age ‏ : ‎ 6 years and up
Item model number ‏ : ‎ 857155
Date First Available ‏ : ‎ December 16, 2019
Manufacturer ‏ : ‎ Steve Spangler Science
ASIN ‏ : ‎ B082MS25Y2
#60 in Educational Science Kits

Product Description

Bursting With Excitement: The Steve Spangler Science Extreme Geyser Tube experiment kit for kids has all the parts you need except for a 2-liter bottle of soda. Attach the tube along with one of 3 different caps—each offering a unique spray style—then drop in some Mentos candies for jaw-dropping, high-flying action! Learning Can Be Entertaining: Chemistry lessons like this are a real thrill for kids. Get them involved in the dynamic hands-on experiment, then have an enlightening conversation about the science hows and whys. Their big eyes & big brains will enjoy the whole process. A Dynamite Gift to Remember: What a fun birthday party activity or gift. If you’re a school teacher, consider rewarding the kids with a magic geyser tube experience out on the playground when the science test is done. So many fun opportunities to use this exciting teaching tool. Expertly Designed: Science can be fun, and it’s even better when you have all the right components...That’s what we include in our kit: trigger mechanisms, tight seals, and a double-pull pin for security to help avoid any messes and enhance the fun. Cheering On Future Scientists & Engineers: Steve Spangler Science is honored to help kids focus on STEM and STEAM projects to grow their knowledge and encourage confidence, collaboration, and creativity. The future looks bright when today’s young scientists are eager to learn more about technology, art, math, and more important subjects.

Important information

Safety information.

CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

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From the manufacturer

geyser tube, geyser tube deluxe, chemical, matter, mentos, pressure, soda, soda geyser, volcano

Turn a bottle of soda and a roll of Mentos candies into an erupting geyser
Comes with 3 additional caps to change the eruption shape
Shoot a geyser up to 30 feet high!

The Toy That Changed YouTube!

Welcome to where the explosions of science fun first occurred: Steve Spangler Science! Our Geyser Tube was the ground-breaking tube from which the Diet Coke geyser science experiment, powered by Mentos, occurred. To date, the Geyser Tube Experiment is one of the most viewed science experiments online. If you’ve ever seen a Geyser Tube in action, you know just how addicting that wild soda eruption can be. We now have the perfect way to share this exciting soda spray gadget with everyone you know.

Geyser Tube How-To

Get the perfect launch and see the Mentos and diet soda reaction for yourself every time — without getting drenched! Attach this special Geyser Tube to any plastic two-liter diet soda bottle. Secure the trigger pin, then load the desired number of Mentos mints into the tube. Once you have locked the pressurizing nozzle in place, pull the pin and clear the area.

What is Happening?

When a Mentos mint is dropped into a bottle of soda, the gelatin and gum from the dissolving candy surface breaks the surface tension of the dissolved gas, disrupting the water mesh. The bubble formations are exacerbated by the thousands of tiny micro-pits (nucleation sites) all over the candy’s surface. With the candy at the bottom of the bottle, the liquid is pushed out of the bottle in a blast!

Quantities Available:

New and improved Geyser Tube
Roll of MENTOS chewy mints
“Runaway” Geyser cap
Fan Geyser cap
Fountain Geyser cap
Activity Guide for creating the ultimate soda geyser


The trigger mechanism now has a double pull pin action, making sure there’s no unwanted eruptions. When you’re ready to pull the pin, a tighter seal means that you can achieve a 30 foot geyser with as few as two Mentos candies.	With the Geyser Tube, you will quickly see how to use this gadget for cool science demonstrations to wow all your friends!	When the mentos candies drop into the bottle, the soda geyser will shoot to an incredible height of 30 feet!

Steve Spangler Science: Making Science Fun!

25+ Years of Making Science Fun

Steve Spangler Science makes a spectacle of science! Gather 'round for hands-on science experiments that awe and inspire while teaching children how to think like scientists. With simple instructions, we make it easy to create spectacular and memorable shared learning experiences together.

What's in the box

Geyser Tube, roll of MENTOS chewy mints, Fountain/Fan/Runaway geyser caps

Videos for this product

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Customer Review: Very awesone

Customer Review: Highly recommend

My son loves it.

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Have a blast triggering a 30ft geyser or soak someone

The SLVRBCK Troop

Customer Review: Inexpensive, reusable fun

Steve Spangler Extreme Geyser Tube Science Kit for Kids

Kortney and Karlee

Customer Review: We had so much fun

Fizz-tastic Geyser Blast Kit!

Moms Need This

20200924 Geyser Tube

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Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.

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Customers say

Customers like the science fundamentals kit for its educational value and fun experiments. They say it's easy to set up and use, with 3 different spray caps. They appreciate the performance and value of the product. However, some customers have reported issues with durability and the geyser attachment breaking after one use.

AI-generated from the text of customer reviews

Customers find the science fundamentals kit fun and great for kids. They say it helps make experiments fun and provides much needed entertainment. Customers also say it's the best way to kill a boring day and a fun gift for kids to use.

"... Good activity to for kiddos !" Read more

"...She loved it, all you need is a bottle of cola and this is hysterical fun . Recommended for outdoor use and worth the price." Read more

"...This helped make our experiment so fun ! Would highly recommend!!!" Read more

"...The tube is easy to use, easy to screw on, and very fun with the height or type of geyser that happens with each lid...." Read more

Customers are satisfied with the performance of the science fundamentals kit. They mention that it works fantastic, works perfectly for the mentos and Dr. soda experiment, and produces better results. The product is great, intuitive, and awesome. Overall, customers have a good time with it and find it a pretty neat little gadget.

" Great stocking stuffer " Read more

"Got this for my daughter’s volcano project. Works great ! She loves the one that sprays more horizontal. Many fun days of wasting cheap soda ahead!" Read more

"... It operates intuitively , I just cut my 7 year old loose with a couple packs of mentos and some off brand 2 liter sodas and he entertains himself...." Read more

"...Overall, it's a pretty neat little gadget and the kids have a good time with it. Just have to keep Diet Coke and Mentos in stock! :)" Read more

Customers find the science fundamentals kit easy to use and set up. They say it's easy enough for kids to do, and that the tube is easy to screw on. Customers also mention that the experiment is easy and fun with the height or the tube.

"Was a lot of fun with my son and his friends. Easy to use to make the mentos and coke experiment easier to execute...." Read more

"...I made my own paper tube loader. Silly me!!! This is so easy to use and the nozzle tops were down right phenomenal! Why did I wait!..." Read more

"This was so easy to use , even my 4 & 6 year old grandkids could work it. This helped make our experiment so fun! Would highly recommend!!!" Read more

"...The tube is easy to use, easy to screw on , and very fun with the height or type of geyser that happens with each lid...." Read more

Customers find the science fundamentals kit worth the price, inexpensive entertainment, and a fun gift. They also say it provides a lot of soda explosion for your buck.

"...Recommended for outdoor use and worth the price ." Read more

"...it is but comparing it to others or others like it, the price seems consistent and fair ...." Read more

"...It’s a great value , especially when you consider you can reuse it over and over again...." Read more

"...Love because it's simple to use, price is reasonable , it's so with it fir the kids...." Read more

Customers find the children's experiments in the science fundamentals kit educational, fun, and informative. They say it's a fantastic addition to any classroom and great for kids curiosity. They also recommend it for hands-on learning and messy soda fun.

"Easy to set up and educational , it's a fantastic addition to any young scientist's toolkit...." Read more

"...This set even has ideas to encourage further learning with the geyser attachment." Read more

"Fun project! Different tips made for messy soda fun !" Read more

" Great for beginner physics ." Read more

Customers like the spray caps included in the science fundamentals kit. They say the different caps are awesome, make it even more entertaining, and let them customize their fizzy fashion. They also mention that the different spouts and tops do different things.

"...The caps let you customize your fizzy fashion .The chemistry magic was so real; I felt like I was in a wizarding school for soda sorcery...." Read more

"My kids love this! Very cool that it comes with different tops so the spray comes out differently with each one...." Read more

"...It made it super easy, and the different tops do different things so it made it even more fun. 10 out of 10 would recommend." Read more

"...What an awesome tool to help make Science more fun! The 3 different caps are awesome for mixing It up and having some fun, but the Turbo Cap was the..." Read more

Customers are mixed about the shot. Some mention that it shoots way higher, while others say that the tube is too short and the geyser doesn't shoot very high at all.

"... Everything erupted EVERYWHERE ...." Read more

"...The design also forces soda to shoot MUCH higher ! But be careful— make sure to hold release while screwing it into bottle...." Read more

"...that came with this kit leaked under pressure and decreased the height of the soda eruption ." Read more

"... Shoots way high ! It comes with several nozzle options and one pack of mentos...." Read more

Customers are dissatisfied with the durability of the science fundamentals kit. They mention that it's poorly constructed, breaks easily, and doesn't last long. Some say that the Mentos are soft and bend after the first use. Overall, some are disappointed with the poor design and the amount they paid for 15.

"... Build quality could be better but for the price it is appropriate." Read more

"...It does not last long , but is a lot of fun. Kids loved it. Way better than trying to drop the mentos in manually because the eruption is much better." Read more

"...Am very disappointed at the poor design and the amount I paid for 15 minutes of fun." Read more

"The kit is super cheaply made . But it works." Read more

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Yellowstone Learning~ Old Faithful Geyser Experiment

This post may contain affiliate links.

This month we took our kids on a family vacation to Yellowstone National Park. My husband and I had never been there, so we were just as excited as the kids were to see the amazing sights. I want to share a couple of fun ways to learn about Yellowstone with your kids as well as a really cool Old Faithful Geyser experiment that we did together. This also goes along with my Geography Projects from A to Z series for the letter G. We are doing projects using the book Geography from A to Z by Jack Knowlton.

Before we left I did a little research to see what things we could do to learn more about Yellowstone on our trip. The very best resource I found was the Jr. Ranger program . In the park visitor centers they have booklets for kids to complete and earn a patch for answering questions about the park. My kids worked so hard to earn their patches! They were very proud to receive them. The Yellowstone National Park site also has a whole bunch of free curriculum units to supplement learning. I printed out a few different ones that were appropriate for my kids and pulled them out on the drives around the park. CurrClick has a $5.00 lap book you can purchase about Yellowstone.

What we loved about visiting Yellowstone were all of the amazing natural things to see that were so stunningly beautiful. It was incredible to me that all of these things happen naturally and are indescribable! At times I almost felt like I was not on our planet because the sights were so foreign! It is a wonderful place to visit with kids. We saw lots of wild animals along our drive and loved all of the paint pots, hot springs and geysers that just pop up along the way.

This picture makes me laugh so hard because we couldn’t get our three-year-old to pose for one more picture!

When we got back we were still talking about all of the fun stuff we saw and learned in Yellowstone, so I thought it would be cool to do an Old Faithful Geyser experiment with the kids to help them better understand how the geysers worked. To do this geyser experiment you need a pot of water, a funner and some tin foil.

Fill the pot full of water and place the funnel in the pot upside down with the tube/spout part sticking up out of the water.

Cover the pot with the tin foil making a hole for the spout of the funnel. to be open and release steam. Turn the pot on high and let it boil. Once it starts boiling steam will escape and then the water will spout out of the tube just like a geyser! My kids really thought this was neat and a great demonstration of how the geyser worked!

In one of the gift shops I found a bookmark that I bought with Advice from a Geyser. I just loved the words. I made an image of it for you below, because we can all use a little advice from a geyser, right?!

See more Geography Projects from A to Z:

Geography Nesting Cans A is for Atoll & Archipelago B is for Beach & Bay C is for Continent D is for Delta E is for Edible Earth’s Core F is for Forest Diorama

Former school teacher turned homeschool mom of 4 kids. Loves creating awesome hands-on creative learning ideas to make learning engaging and memorable for all kids!

Magic Folding Photo Cube for Kids

Seashell Acid Base Experiment

Sedimentary Rocks & Fossil Experiment

Open Ended Rice Sensory Bin Play

Left-handed school supplies for kids.

Candy Learning Ideas

How Greed Got Good Again

In HBO’s Industry , Gen Z reveals itself to be just as money-obsessed as the corporate raiders of Wall Street .

illustration with grainy black-and-white emoji of winking face with dollar signs on open eye and tongue next to hand emoji holding sack with dollar sign on red background

Listen to more stories on curio

T he question before the room was how much blood the banker should bleed. Mickey Down and Konrad Kay sat in an editing bay in Cardiff, Wales, scrutinizing footage from the third season of Industry , their HBO drama about the drug-addled, oversexed employees of a multinational financial firm. They’d paused on one particular shot of a character realizing that his nose had sprung a leak after much snorting of powders. The blood had been added digitally, and it fired down straight and steady from the character’s nostril, like a burgundy laser beam.

Explore the September 2024 Issue

Check out more from this issue and find your next story to read.

The 35-year-old Down, wearing a Nike zip-up vest and thick tortoiseshell glasses, stroked his chin. The blood was looking a little too gruesome. “We just want it to be noticeable; it’s a geyser at the moment,” he said. A producer noted his feedback, and another unpaused the footage. The next shot revealed that the banker had been cradling a newborn baby in his arms—and that the blood had splattered onto the infant’s cheek.

The image, and the writers’ matter-of-factness in discussing it, caused me to gasp. Down gave an apologetic chuckle. “We’re sort of numb to it, aren’t we?” he said. The 36-year-old Kay—the quieter and wryer of the two men—murmured, “It doesn’t register.”

It referred to the depravity of Industry , a study of lethal greed and ambition transmitted from one generation to the next. When the series debuted in 2020, it followed a class of new hires at the London offices of Pierpoint, a fictional competitor to the likes of J. P. Morgan and Goldman Sachs. Young and diverse in race, sexuality, and class , the protagonists entered a century-old institution at which “ culture change ”—an attempt to build a kinder, more ethical workplace—was supposedly afoot. Rather than upending the system, however, the new hires proved quick studies at old-fashioned self-dealing and backstabbing.

Industry has been praised for turning the jargon and technical intricacies of high finance into gripping entertainment. The show is also unmistakably a product of its time: Its pacing is as frenetic as a TikTok binge, and its plotlines touch on Brexit, meme stocks, and—in the upcoming season—green investing. Because of the show’s sharp-witted, slickly produced treatment of money, privilege, and existential emptiness, some critics have anointed it the heir to HBO’s Succession . But where Succession is fundamentally a family saga about the jaded rich , Industry focuses on fresh converts to the savagery and excesses of the business world. In that, it feels spiritually more akin to grandiose send-ups of 1980s corporate boom times: Wall Street , American Psycho , Glengarry Glen Ross . And like those predecessors, Industry can’t help but glamorize the very milieu it’s trying to skewer.

Today’s young adults—so often stereotyped as quiet-quitters and socialist revolutionaries, driven by idealism and fixated on self-care—may seem a far cry from the suspenders-wearing yuppies of the Reagan era. Industry , though, argues that the Wall Street mantra “Greed is good” is very much alive and well. In Down’s view, the typical Gen Zer is “a mini Margaret Thatcher.” He added, “I don’t even think they consider it, like, ‘capitalism.’ It’s just ‘securing the bag.’ ”

The inspiration for Industry came more than a decade ago, when a 21-year-old Merrill Lynch intern who’d reportedly worked for 72 hours without rest died of an epileptic seizure . (“It is possible that fatigue brought about his fatal seizure, but it is also possible that it is something that just happens,” the coroner said.) The then-BBC executive Jane Tranter read a news article about the incident and was horrified. This was a few years after Bear Stearns collapsed, and the ensuing crisis had thrown a harsh light on the win-at-all-costs ethos of high finance. Tranter told me that she had wondered, after the disaster of the 2008 financial crash, “why the fuck would anyone choose to go and intern in one of those banks?”

Then she found two aspiring TV writers who’d done just that. Down and Kay had met as undergrads at Oxford, where they bonded over similarities in their backgrounds. Both men were raised poshly, but their immigrant mothers—Kay’s from Poland and Down’s from Ghana—preached the importance of proving one’s worth with a paycheck. As Down put it, “The immigrant mentality is almost sort of a euphemism for capitalist .” When recruiters from the big banks came to campus, the two friends applied for jobs because it felt like what was expected of them. Down remembers thinking, “What the fuck else am I gonna do?”

Down landed in mergers and acquisitions at Rothschild & Co., Kay in equity sales at Morgan Stanley. They turned out to have little aptitude for the work—both of them left within three years, with dreams of making it in the entertainment world—but they did feel, for a while, seduced by the identity their roles provided. “I was really proud of my Morgan Stanley bag,” Kay remembered. “I’d take it into a bar. I’d be like, ‘Look at me; I’m such a big, swinging dick.’ ”

Big, swinging dick had been a prized title for high earners on Wall Street at least since its appearance in the 1989 book Liar’s Poker , in which the journalist Michael Lewis described the fraternity-like antics he’d witnessed at Salomon Brothers. When Kay and Down joined the workforce in the early 2010s, they quickly found that, despite the recent financial collapse, the BSD ethos was still going strong. “You came into contact with people who had been there literally since 1982,” Down said. “They were stuck in their ways. They were not going to change at all.” And just as the old modes of doing business remained intact, plenty of retrograde views did too. “The moment a woman turned her back, everything was about sex: what she looked like, what she was wearing, who’s fucked her, would you fuck her—all that sort of stuff,” Kay said. “And weirdly, a lot of the misogyny was from very senior women.”

When Down and Kay set about making a series inspired by their time in finance, they quickly realized that they wanted to dramatize the experience of fresh-faced newcomers adapting to an institution that refuses to evolve. The denizens of Pierpoint know that times are supposed to be changing: In one scene, the foulmouthed trader Rishi announces, in a tone of mock triumph, “Bullying has been eradicated from the culture!” Nevertheless, during the first season, the recent college grad Yasmin is targeted by her boss in a sexist tirade at a work dinner. That boss ends up taking a leave of absence and apologizing. Yet as Yasmin rises in the ranks, she pays forward her abuse to colleagues in subtle, but still horrifying, ways.

photo of 3 people talking and drinking pints at small round table in pub

That Yasmin doesn’t look like her tormentor is the point. Previous portrayals of high finance emphasized it as a patrilineage: In Wall Street , the rookie trader Bud Fox idolizes the diabolical Gordon Gekko as the sort of man he can aspire to become. But Industry revels in the complexities of mentor and mentee relationships in a workplace shaped by overlapping social and demographic waves. In the first season, Harper Stern—a Black American trainee at the bank—finds her allegiances torn between two bosses: Daria Greenock, a white Millennial fluent in the rhetoric of corporate feminism, and Eric Tao, an Asian American Gen Xer feared for his ruthlessness. Both try to woo Harper with identity-based overtures. “People like us, born at the bottom … we intimidate people here,” Eric says, positing himself and Harper as fellow outsiders.

Ultimately, though, Harper doesn’t seem to feel sentimental affinity toward any of her elders. All she shares with them is a thirst for winning—and so she strategizes based on who has more clout in the corporate hierarchy. Myha’la Herrold, the actor who plays Harper, told me how she thinks about her character’s dynamic with Eric: “He’s like, Oh, I’m seeing myself in you . And she’s like, I would like to see myself where you’re sitting .”

Some viewers may be tempted to wonder whether Down and Kay have gone overboard on the cynicism. But just this year, a 35-year-old Bank of America associate who’d reportedly complained about 100-hour workweeks died of a sudden heart problem—recalling the sort of tragedy that inspired Industry years ago, and that was dramatized in the show’s premiere. (No definitive link between the employee’s workload and death was determined.) Surveys of generational attitudes about money and work suggest that growing up amid the chaos of inflation, crypto, and a pandemic—not to mention the constant, conspicuous salesmanship of online influencers—has encouraged, not challenged, aspirations toward wealth among young people. A recent New York Times article reported that college students are angling for so-called sellout jobs with a zeal that surprises longtime faculty. At Harvard, the share of grads going into finance and consulting is reaching heights not seen since before the 2008 financial crisis.

And despite Industry ’s disturbing take on the high-finance lifestyle, many in its audience have been the opposite of repelled. The creators told me that they regularly hear from new bankers who say that the show inspired their choice of career. One friend of Down’s reported that multiple people in his M.B.A. program had enrolled because they were hard-core fans of Industry . Recently, in a West London pub, two young guys approached Kay to express their admiration for the series. They seemed like exaggerated versions of the showrunners’ earlier selves—“two actual drunken, coked-up—for want of a better word—morons,” Kay said.

François Truffaut once said that no movie about war could ever truly be anti-war; history has shown the finance world to be virtually shame-proof. Young bankers have treated Liar’s Poker , an exposé, as “ an instruction manual ,” Lewis has said. Gordon Gekko lives on as a dorm-poster symbol of alpha-maledom. Even the sadistic, chain-saw-wielding Patrick Bateman of American Psycho has, in recent years, been memed as a mascot for the “rise and grind” ethos that some young men fetishize: wake up, work out, make money, repeat. (So what if a few body parts are stashed in the fridge?)

Down and Kay understand why finance types love their show. For all its darkness, Industry is a pageant of beautiful and superhumanly competent people entangled in slinky romances and high-stakes dealmaking. Entertainment about hyper-capitalism “has to have both the seductive element to it and the warning,” Down told me, and the seductive elements include fine cars, expensive clothes, and the freedom to do and say whatever you want so long as you’re closing deals. In Wall Street movies, “the first act is usually ‘Look how amazing this all is,’ ” Down said, and “every finance bro seems to just forget about the third act.”

But the show’s deeper appeal lies less in its depiction of the spoils of success than in its dramatization of the actual work. Industry ’s seductions and warnings seesaw relentlessly; each trading-floor triumph or delirious night at the club tends to crash into a comeuppance and a monstrous hangover. Even the older, more experienced characters are perpetually grinding—not because they have to, but because they want to. As one billionaire hedge-fund manager explains in the show, “It’s all just a cycle of victory and defeat.” The people of Pierpoint are addicted to the cycle itself.

Season 3, which premieres August 11, intensifies that chase to sometimes-nauseating extremes. “Every time we come back to Industry , it’s the same, but bigger and more … gross,” Herrold told me. The show is more lurid in its tone, more shocking in its twists, and it delivers, as Kay put it, even more “weird sexual stuff ” than before. “We just want to throw everything at the wall,” Down added. “The sweet spot for this show is when people”—audience and characters alike—“are about to have a heart attack.”

The escalating grossness is also making a broader point about the stakes of the game that Industry ’s characters are playing. This season focuses on the rise of ESG investments—short for “environmental, social, and governance.” Looking to tout itself as the greenest mega-firm in the business, Pierpoint funds a sustainable-energy company headed by Henry Muck, a handsomely vapid child of privilege played by Game of Thrones ’ Kit Harington. In the real world, ESG has been evangelized as a market-driven solution to the climate crisis, appealing to the idealism of younger investors and consumers. It has also been exposed, in various instances, as a front for fraud, speculation, and the rebranding of the planet’s worst polluters.

photo of bearded man in suit and tie sitting in large armchair in opulent room

Unsurprisingly, Industry ’s angle on all of this proves, in Kay’s words, to be “the most cynical view you could possibly have.” The show makes quite clear that its characters and the institutions they work for are glorified gamblers—and that they’ve rigged the global casino so that their debts get paid by other people. Meanwhile, the lifestyles of the rich and amoral glitter more than ever; the new episodes’ settings include a yacht, a private jet, and a sprawling old-money estate. Although Industry ’s characters have never been virtuous, the “stripping away of humanity,” Kay said, is all but total this season.

Part of that is simply a function of time passing on the show: The longer these characters remain enmeshed in their work, the more corrupted they become. Eric—separated from his wife and in the throes of a midlife crisis—wins a promotion and gets caught up in toxic C-suite machinations. He realizes that there is always another moral line he’ll have to cross to succeed at his job. “We really did experiment with, like, ‘What happens if this guy really sells his soul for money?’ ” Kay said. “ ‘What happens if he really keeps making decisions which get rid of his personhood and make him an embodiment of the institution?’ And it takes him to a pretty fucking dark place.”

At its core, the show remains a portrait of intergenerational continuity, of avarice bridging gaps of age and sensibility. In Cardiff, I watched Kay and Down edit a scene in which a veteran money manager lectures Harper about the usefulness of insider trading (he’s nearly quoting Gordon Gekko’s dictate to only “bet on sure things”). The elder character, wearing a necktie while fly-fishing, refers to the younger one, who is clad in a leather trench coat and has a nose ring, as “terribly modern.” The line lands as a joke: Though they hail from different historical eras, these two characters are, in some ways, interchangeable. If Industry has a “thesis,” Kay said, it’s that, although social mores change, one generation of “animals with an economic incentive” is exactly the same as the next.

This article appears in the September 2024 print edition with the headline “How Greed Got Good Again.”

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IMAGES

Homemade Geyser Tube
Yellowstone Learning~ Old Faithful Geyser Experiment
How To Make A Geyser For A School Project
Soda Geyser Eruption Experiment
Soda Geyser Eruption Experiment
Dry Ice Geyser Experiment

COMMENTS

Geyser: Fluids & Heat Science Activity
There are three main phases to this geyser's cycle: heating, erupting, and refilling. The heating time required to cause an eruption is based on two main factors: The energy output of the heat source and the length of the glass tubing. The longer the glass tube, the more pressure there is on the flask of water.
Mentos® Geyser Experiment
Find the experiment with soda and Mentos at Steve Spangler Science, with instructions on how to make a huge explosion. View the Mentos Geyser Experiment here!
Soda Geyser
Soda Geyser | STEAM Experiment for Kids by Emily | Jul 31, 2019 | STEAM Experiments, STEAM for Kids | 2 comments Note: This post contains affiliate links. You may read my disclosure here. My brother-in-law and his family went on an epic month-long vacation this summer along the Pacific Northwest and over to Wyoming.
Geyser Science Experiment
Get stuck into this fun, fascinating science experiment. With just four simple steps, kids can create their own fab fountain that looks just like a geyser!
Geyser Science for the School-Age Crowd
One of the main scientific elements in geysers is pressure, so our experiments largely focused on how pressure works and its affects on objects. Pressure of water in a bottle - This activity required a tub, a clear 2-liter bottle with the label removed, a thumb tack, a funnel, and a pitcher of water. I used the thumb tack to poke a small hole ...
Homemade Geyser Tube
Steve Spangler has been performing and explaining the Mentos Soda Geyser for years. So many geysers have erupted, in fact, that a device was designed to streamline the process. The Geyser Tube ™ is, hands-down, the very best way to ignite a soda geyser that can erupt 15 feet (4.5 m) - or more - into the air. Of course, you may want to experience a soda eruption right away so here's how ...
Mentos and Coke Experiment: How-To Plus Free Worksheet
The Mentos and Coke experiment is a great hands-on example of a physical reaction. Plus, kids will love the exploding geyser of soda!
Mentos and Diet Coke Experiment
Later on in the experiment, you'll be invited to compare the geyser power of diet versus regular soda, but for now we'll start with a 2-liter bottle of diet soda.
Soda and Mentos Geyser Experiment
The Soda and Mentos geyser experiment is a classic and exciting demonstration of the interaction between carbon dioxide gas and liquid. In this experiment, you'll create a dramatic geyser by dropping Mentos candies into a bottle of soda. This experiment is both fun and educational, providing a hands-on way to explore gas release and nucleation.
The Science Behind the Mentos-Soda Geyser
Many people assume that the geyser forms when a Mentos candy is dropped into a bottle of soda because of an acid/base reaction, just like when you mix baking soda (sodium bicarbonate) and a vinegar solution (acetic acid in water) to create the ever-popular "volcano" science project. While the volcano project is most certainly acid-base ...
Super Fun (and Explosive) Soda Pop Geyser Experiment
Looking for a fun explosive science experiment for kids? This soda and Mentos experiment will be a huge hit! Kids of all ages love making this soda pop geyser.
Soda geyser
Soda geyser. A soda geyser is a physical reaction between a carbonated beverage, usually Diet Coke, and Mentos mints that causes the beverage to be expelled from its container. The candies catalyze the release of gas from the beverage, which creates an eruption that pushes most of the liquid up and out of the bottle.
Coke and Mento Experiment
Drop mentos into coke for an explosive reaction! A brilliant classic chemistry experiment for kids. Make your own mento geyser
Mentos Geysers
Mentos Geysers This was my favorite of our Fascinating Science for Kids experiments…although it only lasted about 20 seconds. The boys, Prince Charming, and I were all amazed with what happened when we dropped Mentos into a bottle of diet soda!
Dry Ice Soda Geyser Experiment • The Science Kiddo
Create an impressive soda geyser eruption by mixing dry ice in soda! This is an incredible jaw-dropping dry ice soda geyser experiment for adults and kids alike! A dry ice geyser makes an amazing soda geyser science fair project or just a fun outdoor science experiment the entire family will love.
Soda and Mentos Geyser Activity
This is a great activity to spark a discussion about chemical reactions. Note: Find more science experiments on my Science Activities for Kids page! To make a soda and Mentos geyser, you will need the following materials: 2 liter bottle of Diet Coke. Pack of Mentos (we used mint, but any flavor should work)
Rainbow Mentos & Soda Geyser
Have you ever tried the mentos and soda geyser experiment? It's one of the most fun experiments out there! Take it up a level with this RAINBOW one!
How To Make A Mentos and Diet Coke Geyser
Today's experiment was so exciting! It involves only two ingredients- mentos and diet soda! We also purchased a geyser tube that we saw on @stevespanglerscience which is so awesome in helping to store and release the mentos at a specific time for an epic explosion!
Soda Geyser Eruption Experiment
Supplies for Experiment To create the Soda Geyser Eruption Experiment, you only need two ingredients and one supply item. 2 Liter Bottle of Soda (Regular or Diet) Mentos Candy Tape I purchased the store brand soda and it worked great! At only 59 cents a bottle, I decided to buy two.
Explosive Science Experiments for Kids
Awesome explosive science experiments for kids. Make a coke and mento geyser, vocanoes, exploding marshmallows and erupting soap!
Steve Spangler Science Extreme Geyser Tube
Our Geyser Tube was the ground-breaking tube from which the Diet Coke geyser science experiment, powered by Mentos, occurred. To date, the Geyser Tube Experiment is one of the most viewed science experiments online. If you've ever seen a Geyser Tube in action, you know just how addicting that wild soda eruption can be.
Yellowstone Learning~ Old Faithful Geyser Experiment
Learn about Yellowstone National Park with an Old Faithful Geyser Experiment using just a pot of water, a funnel and some tin foil.
PDF MENTOS GEYSER EXPERIMENT
MENTOS GEYSER EXPERIMENT It's been called the 11vinegar and baking soda" reaction for a new generation. While science teachers have been dropping candies and mints into 2-liter bottles of soda for years in an effort to release all of the dissolved carbon dioxide, the Mentos and Diet Coke reaction became world famous in 2005. Fueled by hundreds of biogs and popular online sharing sites like ...
'Industry' Isn't the Heir to 'Succession'
In HBO's Industry, Gen Z reveals itself to be just as money-obsessed as the corporate raiders of Wall Street.

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2. If using a geyser tube, load the Mentos. If using a homemade paper roll, drop the Mentos into the roll while holding the bottom closed with your finger.

3. Placing a 2-liter bottle of Coke on a flat surface, remove the cap, and drop the Mentos into the open Coke bottle.

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