Sky Zone, Boston

Gravity has no control within Sky Zone Everett's confines. Inside, a sea of trampolines sends visitors leaping, spinning, and somersaulting toward springy floors and pits of foam. The bouncy surfaces stretch to the walls, where trampolines set at 45-degree angles let kids and adults repeatedly soar through the air like a superhero trying to wrack up frequent flier miles.

Occasionally, Sky Zone transforms into high-paced competitions such as 3-D dodge ball.. The trampoline-lined arena also hosts SkyRobics classes that utilize low-impact calisthenics and strength-building exercises.