Blitz Air Park, Portsmouth

Blitz Air Park trades floor and wall space for black and acid-green trampolines surrounded by bright blue padding. Toddlers, kids, teens, and adults bounce around on trampolines of various sizes on the freestyle court, burning off excess energy and calories. On the specialty courts, they participate in basketball-dunking contests and dodgeball games.

When they get tired of all the bouncing or start to freak out when they realize that gravity is only a theory, jumpers can take a break in the arcade and party rooms.