March Science Project – Elephant Toothpaste

March Science Project - Elephant Toothpaste

Elyse Prestopnik, Reporter

WARNING: Make sure to do the following project with an adult for extra precaution.


Along with the “ingredients” list, please make sure you also have safety glasses, measuring cups, measuring spoons, a large tub or tray to catch the foam, and a location to catch spills (outside). 


To Make Elephant Toothpaste, you will need:

  • Empty Plastic Bottle
  • Dry Yeast (This can be found in the baking section of the grocery store if you don’t have any)
  • Warm Water
  • Liquid Dish Soap
  • 3% Hydrogen Peroxide
  • Liquid Food Coloring (optional)
  • Different shaped bottles or glasses (optional)



  1. Put on your safety glasses!
  2. Place your plastic bottle on the tub or tray.
  3. Add ½ a cup of hydrogen peroxide to the bottle.
  4. Add a big squirt of the dish soap to the bottle and then swirl the bottle gently to mix it.
  5. If you want to make the foam a solid color, add a few drops of food coloring. If you want to give it stripes (like some toothpastes), then add a few drops around the rim, and let it drip in.
  6. In a measuring cup, mix together one tablespoon of the dry yeast, and three tablespoons of warm water. Stir for about 30 seconds. 
  7. Pour the yeast mixture into the bottle (or have an adult do it for extra precaution!) and quickly step back! Watch what happens!


Here are some extra activities if you’re curious:

  1. Try it with dish soap! What happened? What changed?
  2. Try it with different shaped containers! Did anything change?