With the help of her kids, certified personal trainer Jodi Hamilton-Eichensehr designed a family-friendly playspace celebrating the fun of fitness with games and obstacle courses centered on a giant animal-themed jungle gym. Guarded by a toucan and gorilla, the gym's labyrinthine interior conceals bridges, tunnels, ladders and slides, as well as a trapdoor to the Fountain of Youth. As kids traverse the gym, their bodies covertly enjoy a full cardio workout while building balance, hand-eye coordination, and confidence. Small-group fitness classes teach children about nutrition before building up their appetites with activities such as dashes through the jungle gym or sprints across a running track peppered with hurdles. Jodi also hosts adult classes, which emphasize fun, varied fitness, from cardio to strength training, to build parents' stamina during capture-the-flag tournaments at the office. Staffers also host unforgettable soirees for birthdays, which split guests' time between the jungle gym, party room, and video arcade.