If you're looking for a fun, different kind of backyard toy for the whole family to play with, you've gotta check out this bowl trampoline.
Plum makes these Plum Bowls, which are essentially giant trampolines with a slanted trampoline around the perimeter. This makes backflips and other tricks much easier to accomplish.
Based on videos I've seen of the Plum Bowl, it seems like a great tool for dancers, gymnasts, and other athletes for low-impact practice in addition to just being an all-around awesome toy for kids.
Check out this bowl trampoline, which is sold online by Dick's Sporting Goods and other retailers, here.