Aero Pendulum Clock
The Aero Clock isn't just a 3D wooden mechanical model, or a pretty showpiece. The Ugears Clock is an actual working clock that you can build yourself, mount to a wall, wind up, then watch as the seconds, minutes, and hours tick by.
Notes from Alex:
Unfortunately, we will never be able to have a model of this at an event, since it is simply too large and too complicated to transport. Which is a shame, because it's an absolutely stunning piece.