Watch a piece of ivory soap grow up to 10 times its original size. It is a soap monster! This activity demonstrates the properties of solids, liquids, and gases in a very dramatic way. You can even take your Soap Monster home and use it as bath flakes in your bathtub.
Soap Monster Video (Soap Souffle) from Steve Spangler Scientific: https://www.youtube.com/watch?v=WGh-ygfX_hg