In my continuing quest for kid friendly experiments, I came across a guaranteed recipe for fun: mix together 3 parts cornstarch and 1 part water for some for some wonderful "goop". The kids had so much fun playing with this, and even I enjoyed it! (Nothing like indulging your inner child!) I have to admit, the mess was initially worrisome to this neat-freak mom, but cleanup was really a breeze; it wiped right up with a wet washcloth! I think this one's a keeper.