For some reason, my kids always have lots and lots of foam laying around. Most of it comes in the form of packaging from their toys and dolls. The rest is leftover scraps from the various craft projects they make to line my walls. I never quite know what to do with it, so I thought this coaster idea is pretty darned cool. It's perfect for little kids because it's not too technical and it's good for big kids because they can get creative with shapes and colors. And it makes something useful ... you just can't ask for more than that!