When a building starts to sway, it's generally a sign of stiff winds or poorly maintained architecture. At Pump It Up, however, it's merely an indication that another energetic child has occupied one of the bouncy fortresses. The facility boasts a climate-controlled indoor playground, complete with inflatable slides, obstacle courses, and, of course, houses that beg kids to safely bounce off the walls. The staff invite parents and kids for open playtime and also help host private birthday parties and camps that combine playtime with arts, crafts, and pizza.