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This fantastic foamy fountain experiment, also called Elephant Toothpaste is SO very much fun! We did this experiment years ago and I decided it was time to revisit it with my younger kids.
We decided to try it with with both regular hydrogen peroxide and the 6% solution at the same time and compare the difference. In our images, the red is with the stronger solution and the blue is with the regular hydrogen peroxide.
Watch the Video of us Making Elephant Toothpaste
You have got to try this fun elephant toothpaste experiment with your kids. It’s amazing to see the the simple chemical reactions you can make from things in your own house!
Ingredients for Elephant Toothpaste Experiment:
A clean water bottle- we used glass milk bottles
1/2 cup 6% solution hydrogen peroxide liquid
1 Tablespoon (one packet) of dry yeast
3 Tablespoons of warm water
1 Tbsp liquid dish soap
How To Do the Elephant Toothpaste Experiment:
First, a note about the Hydrogen peroxide: You need a 6% solution. You can get this from a beauty supply store or on Amazon. This time we tried it with both the regular 3% hydrogen peroxide solution and with the 6% solution side by side so my kids could see the difference between the two.
As you can see from the pictures, foam will overflow from the bottle, so be sure to do this experiment on a washable surface, or place the bottle(s) on a tray.
Pour 1/2 c. of hydrogen peroxide into the bottle. Then add about 10 drops of food coloring into the bottle.
Next you will mix in 1 Tbsp. of liquid dish soap into the bottle and swish the bottle around a bit to mix it. This will create more foam in the reaction.
In a separate small cup, combine the warm water and the yeast together and mix for about 30 seconds.
Lastly, pour the yeast water mixture into the bottle (a funnel helps here) and watch the foaminess begin!
How Does the Elephant Toothpaste Experiment Work?
Each tiny bubble made in this foamy experiment is filled with oxygen. The yeast acted as a catalyst (a helper) to remove the oxygen from the hydrogen peroxide. Since it did this very fast, it created lots and lots of bubbles.
Did you notice the bottle got warm. My kids said this when they touched the foam. This experiment created a reaction called an Exothermic Reaction. An Exothermic reaction creates heat!
This experiment is called “Elephant’s Toothpaste” because it looks like toothpaste coming out of a tube, but don’t get the foam in your mouth! It is definitely not edible.
See More Awesome Projects in my new book: Science Art & Drawing Games for Kids