Want to be an astronaut? Good news! Apparently all it takes to get the best conditioning possible is being able to bounce around on a trampoline and get beaned by the occasional ball. That's because Spaceball is — according to Scott Carpenter, one of NASA's Mercury Seven astronauts — "the best conditioning exercise for space travel."
As for the game itself, it's a little confusing to figure out — or to figure out which part is fun, at least. You bounce around in your compartment while trying to toss the ball through a little tunnel in the middle and get it by your opponent. Spaceball supports two players under 200 pounds each, and takes up an area of your yard that's 14' by 8½'.
It's all yours for only $700, or quite a few space bucks for you astronauts-in-Spaceball-training.