Have you seen Reuben Margolin's wave sculptures? Completely mind-blowing. All the movement is mechanical (pulleys, strings, motors, etc) and absolutely no computers, chips, processors or the like. And the guy works almost exclusively with salvaged junk (which he carts home on his rickshaw bike). I haven't actually seen these videos (not having high-speed), but if they have half the impact of what was on TV, they're totally worth it. Click here to see for yourself.
The rest of the show was full of other interesting things as well. Like a treadmill bike (seriously--it travelled around like a bicycle, but you're running on a treadmill) and a clip about a converting a shopping cart into a chair: despite how bad that may sound, it looked great.
Hope you enjoy...I just had to share,