Andy and Terry live in a 26-story treehouse. (It used to be 13 stories, but they've recently expanded.) It has a bumper car rink, a skate ramp, a mud-fighting arena, an antigravity chamber, an ice cream parlour with 78 flavors (run by an ice cream-serving robot called Edward Scooperhands), and the Maze of Doom -- a maze so complicated that nobody who has gone in has ever come out again. Well, not yet, anyway.