All right everyone needs to try this at least once.
We had the boy's 10 year old birthday party today.
We rented out a Whirly Ball joint for an hour and a half.

If you haven't seen it or heard of it it's a kick.
It's five on five. The kid's are in bumper cars. Each kid has a jai-alai racket. They roam around racking each other and trying to score a goal in a sort of basketball type deal.
We kicked the kids out after about an hour and did the last 15 or 30 minutes ourselves. Kick in the pants.

http://www.whirlyball.net/html/