This appears to be one of the coolest kits. It's circuit bent awesomeness in a wooden box.
The board is beautiful. It's got rhythm that you mess with by touching contact points.
It sounds really cool, take a listen and check the video! - Link
Wander round the site while your at it for some circuit bent inspiration. I've been looking through all this stuff for a while and I'm itching to fire up the soldering iron. - Link