Howl's Moving Castle, by Kazunori Ito.
This is probably the most animation-heavy simobject I've seen so far. The wings flap, the mouth opens and closes, and the tongue moves in and out, there a couple of turning gears, three "smoke stacks" in the rear that move around, rotating props, and to top all that off, a dangling bucket.
It's weird looking, too. So, what's not to like?
