I realize that this how-to strays a bit from our normal fare, but goshdarnit, it's too cool not to share! Maybe it's the overgrown kid inside me or my love of science (have I told y'all I was in the science club in high school?? Geek to the max.), but the idea of making bouncy balls--from scratch--out of regular ol' household items totally intrigues me. If you're equally intrigued, or just want to impress your five-year-old, check out what you'll need below!