(A.K.A. Elephant's Toothpaste)
My Little Mister was fascinated by the "snow" that bubbled out of the bottle!
He wanted to make snowballs and snow angels!
The experiment was fun, but he was disappointed we could not get in it.
The Science behind the play:
You are actually making foam AND heat.
The foam here is special because each tiny foam bubble is filled with oxygen (O2). The yeast acted as a catalyst - or helper - to remove the oxygen from the Hydrogen Peroxide (H2O2). Since this happens very fast, it created LOTS and LOTS of bubbles.
You might have also noticed the bottle getting warm. This experiment created a reaction called an Exothermic reaction. Simply meaning it released or created heat.
The foam created is just water, soap and oxygen so it is easily cleaned up and any remaining liquid in the bottle can be poured down the sink!
FUN and SAFE!