Science tidings

Epic Elephant Toothpaste Experiment

Elephant Toothpaste Experiment is a chemical reaction that produces a large, foamy eruption resembling toothpaste squeezed from an elephant's trunk. It’s a fun and engaging experiment that teaches kids about the power of chemical reactions and can be done right in the comfort of your own home with just a few household items.
Elephant toothpaste experiment purple color

Are you ready for an explosive science experiment that will blow your mind? We’re talking about the Elephant Toothpaste Experiment – the ultimate DIY experiment for kids who love to see reactions happen right before their eyes.

Materials Needed

  • Hydrogen peroxide (6-12% concentration)
  • Dry yeast
  • Dish soap
  • Warm water
  • Food coloring (optional)
  • Large plastic bottle or container
  • Funnel
  • Safety goggles and gloves

The elephant Toothpaste Experiment is a chemical reaction that produces a large, foamy eruption resembling toothpaste squeezed from an elephant’s trunk.

  1. Mix the Hydrogen Peroxide

    To begin, you’ll need to mix one cup of hydrogen peroxide with a few drops of food coloring (if you’d like to add some color to your experiment). Give it a gentle stir to mix the coloring in.

  2. Mix the Yeast Solution

    In a separate bowl, mix one tablespoon of dry yeast with three tablespoons of warm water. Stir until the yeast is fully dissolved. Add a squirt of dish soap and mix gently.

  3. Pour the Yeast Solution into the Hydrogen Peroxide

    Using a funnel, quickly pour the yeast solution into the hydrogen peroxide mixture. Stand back and watch the magic happen! The mixture will start to foam and bubble as the chemical reaction takes place, creating a massive eruption of foam that looks like toothpaste coming out of an elephant’s trunk.

Safety Precautions and FAQs

  • What are the safety precautions that I can take while performing this experiment?

    Make sure to wear safety goggles and gloves to protect your eyes and skin from hydrogen peroxide and yeast. Perform the experiment in a well-ventilated area to avoid inhaling any fumes. And once you’re done, dispose of the mixture properly, as it can be harmful to the environment.

  • Can I touch the foam?

    While most of the hydrogen peroxide is broken down during the reaction, there may still be some leftovers that could potentially irritate your skin or eyes. So, it’s best to avoid touching the foam just to be on the safe side.
    However, if you’re using the 3% hydrogen peroxide commonly found in drug stores, the foam should be safe to touch. So, go ahead and give it a squish! Just make sure to follow all safety precautions and dispose of the mixture properly when you’re done.

  • Will the bottle shape and size affect the experiment?

    Yes, the shape and size of the bottle can have an impact on the Elephant Toothpaste experiment. The reaction produces a lot of foam, so if the bottle is too small, it can overflow and make a mess. On the other hand, if the bottle is too large, the reaction might not be as exciting to watch. It’s recommended to use a medium-sized bottle or container that can handle the reaction without overflowing. Additionally, the shape of the container can affect how the foam expands and flows, which can also affect the visual effect of the experiment. A tall, narrow container might create a taller foam column, while a wider container might create a wider, shallower foam spread. So, you can experiment with different bottle shapes and sizes to see how they impact the final result!

  • What happens if I add more yeast?

    If you add more yeast to the mixture, the reaction will likely become more vigorous and produce more foam. The yeast acts as a catalyst, meaning it speeds up the reaction between the hydrogen peroxide and soap, which produces the foam. However, adding too much yeast may cause the reaction to happen too quickly, which could result in the foam overflowing from the container. It’s important to follow the instructions carefully and not exceed the recommended amount of yeast.

The science behind the elephant toothpaste.

Elephant toothpaste is a fun science experiment that involves the rapid decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2). The reaction is catalyzed by a small amount of dish soap and yeast.

Hydrogen peroxide is a chemical compound made up of hydrogen and oxygen atoms, with a molecular formula of H2O2. It is a colorless and odorless liquid that is commonly used as a disinfectant and bleaching agent. It is also used in rocketry as a propellant, due to its ability to rapidly decompose into water and oxygen.

The reaction that occurs in elephant toothpaste is an example of an exothermic reaction, which means that it releases heat as it occurs. When hydrogen peroxide is exposed to yeast, the yeast acts as a catalyst, speeding up the decomposition of hydrogen peroxide into water and oxygen. The dish soap, which is also added to the mixture, helps to create foam by trapping the oxygen gas produced by the reaction.

The chemical reaction that occurs can be represented by the following equation:

2 H2O2 → 2 H2O + O2

This means that for every two molecules of hydrogen peroxide, two molecules of water and one molecule of oxygen are produced. The reaction is highly exothermic, releasing a large amount of energy in the form of heat and light.

The dish soap is added to the mixture to create foam. When the oxygen gas is produced by the reaction, it becomes trapped in the soap bubbles created by the dish soap. This creates a large amount of foam that can resemble toothpaste coming out of a tube, hence the name “elephant toothpaste.”


The Elephant Toothpaste Experiment is a fun and engaging way for kids to learn about chemical reactions and the power of science. By following these simple steps and taking safety precautions, you can create your own epic eruption of foam right at home. So gather your materials, put on your safety gear, and get ready for a science experiment that’s sure to impress!

Do you want to know how to blow up a balloon without easing your mouth? Read here

Image source: Michigan Medicine YouTube Channel

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