A playground can be the site of a first birthday party, a first transatlantic paper-airplane flight, and a first doctoral dissertation on the geothermal impact of teeter-totters. Make a scientific breakthrough while breathlessly jumping with today's Groupon: for $15, you get three open-bounce admissions at BounceU in Stratford (up to a $30 value).

BounceU transports kids to an inflatable, climate-controlled playground where they can bounce from side to side in a safe, secure environment. Kiddies can groove to an upbeat song and practice for future careers as catapult payloads during open-bounce sessions scheduled at various times throughout the week. Adults are welcome to act like 8-year-olds and join the vivacious youngsters in the playground, where they can duel with the foam-shooting equipment or mount the climbing structures while imagining they're synchronized leapers in Michael Flatley's Riverbounce. The attentive BounceU staff monitors the rebounding playground at all times, ensuring that the facilities are safe and clean.

Everyone must fill out a waiver to bounce. If the bouncer is younger than 18, a parent or guardian must sign the waiver and be present throughout the play session.