Lego Technic 4×4 Crawler
The problem with some Lego sets is once they're built, there's not much you can do with them — the more elaborate the set, the less sturdy it seems to be. Unless you're talking about this Lego Technic 4×4 Crawler ($200). Clocking in at 1,327 pieces, this beast features motorized 4-wheel steering and 4-wheel drive, opening doors, an "extreme" suspension, and a remote control that communicates with the included servo via IR. Take that, stationary Star Wars set.