There is lots of this stuff out there. Still, they're getting more interesting with each post, so we've decided to show you a couple of them. The first one's a Wiimote-controlled Lego-made robot arm while the second's a 15-ton grappler, also controlled by a Wiimote.
To duplicate this feat, you apparently need the Wiimote, a bluetooth adapter, a computer attached to the robot arms, progamming software (in the grappler's case, Python), and well, some solid programming background.