You can also by individual Fakini balls for about $20 and I think the shell by itself will run you about $20-30 by itself (on the same site I gave you). You can go for cheaper alternatives though it'll probably be a plastic set that come with balls that don't bounce. The Fakini balls are made out of silicon and they do bounce and come with a lifetime warranty as well (as long as Mr. Radke is still alive). There's also a cheaper (not much cheaper...about $80) set called the Dream Silicon Balls. They come with an extra (yet unnecessary) shell and a DVD, but from what I hear the shells are very poorly made.