How does an elephant keep his tusks so clean? He uses his toothpaste just like you! How does he get it? Kids just like yours make it for him. This is a great example of a chemical reaction that creates a rapid expansion of foam. Grab your kids and your Jr. Science journal and start tracking your results today!

You will Need:

1/2 cup 20-volume hydrogen peroxide liquid (20-volume is a 6% solution, which can be found at a beauty supply store or hair salon)

1 Tablespoon of dry yeast

3 Tablespoons of warm water

Liquid dish washing soap

Food coloring


1.  Put on gloves and goggles. The concentrated hydrogen peroxide used in this experiment will burn the skin and eyes. It can also bleach fabric, so choose your clothing with that in mind.

2.  Pour hydrogen peroxide into the bottle. Using a funnel might help

3.  Add 8-10 drops of food coloring into the bottle.

4.  Add about 1 tablespoon of liquid dish soap into the bottle and mix the solution by swishing it around.

5.  Mix the warm water and the yeast in a separate small cup for about 30 seconds. This activates the yeast.

6.  Mix with a spoon for 30 seconds, then remove any large lumps.

7.  Pour the yeast mixture into the bottle and stand back!

We found this recipe at:

 Make sure that you get out the safety equipment before you start this project. It’s super messy so you may want to set up outside! Don’t forget to post your experience on our Facebook page!