Mars Exploration Rover

Articulated, snap together, Mars Rover! No screws, glue, or support structure needed (although some glue in a few places wouldn't hurt). All the parts can be posed, turned, twisted. The wheels turn and the legs even pivot like the real thing to go over obstacles! Unfortunately, it is not autonomous.

http://en.wikipedia.org/wiki/Mars_Exploration_Rover

2011-07-19 Update: V3 fixes a problem with plate 5 that was causing some pieces to be too close together and get merged, makes the axel h