Elephant's Toothpaste

Ingredients

• 1 plastic plastic cup for stirring

• 1 stir stick or spoon 

• 1 plastic bottle

• 1 tin foil pie sheet

• 1 funnel 

• Kettle

• 30 ml of warm-hot water

• 3-4 drops of food colouring

• 1 tsp of yeast

• A splash of dish soap

• 100 ml of 6% Hydrogen Peroxide

Instructions

1. Boil the water

2. Place the bottle into the tray and add 3-4 drops of food colouring

3. Add a squirt of dish soap into the bottle

4. Place funnel into bottle opening

5. Pour 100 mL of 6% hydrogen peroxide

6. Pour  30 mL of warm-hot (50˚ C) water into a separate cup

7. Add 1 teaspoon of yeast into the hot water and mix with a stir stick or spoon

8. Mix until all of the yeast is dissolved in the water

9. Pour this yeast solution into the bottle through the funnel and then remove the funnel quickly

10. Watch and enjoy!

What’s Happening?

The yeast breaks apart the oxygen (O2) in the hydrogen peroxide (H2O2). The oxygen that comes out is a gas and it wants to come out of the container as fast as it can, because it is mixed with soap it creates a lot of bubbles; which is what we see coming out of the bottle.