I just learned that someone has built a desk that is also a pipe organ. Opening and closing the doors plays notes on the pipe organ, and the right tune will also open a secret drawer.
The best part? It isn't electronic; it's wood, carving, and design. I had no idea the world needed such an item, but it did. It is definitely richer for the work.
I hadn't heard of Kagen Schaefer before, but I think I'll be paying more visits to his site to see what else he's come up with.