Jon and I discovered this neat trick when I was telling him about my science project in 5th grade--the dancing raisins. With this inspired notion, I threw a grape in his ginger ale. And the grape started dancing. Who knew it didn't have to be raisins in seltzer water only? Try it. Get a grape or few and toss it into a glass of carbonated liquid. I dare you not to be happily amused for at least a few minutes. DARE YOU.