Oobleck is an amazing substance. It flows like a liquid when relaxed, but stiffens to solidity when struck, before relaxing once again.
This demonstration adds a twist (or a rumba!) Putting oobleck into a cookie sheet, and suspending it over a subwoofer playing a variety of tones will cause the oobleck to jump and dance.
Recipes, equipment needed, options, and tips for easy cleanup are included.