Introducing: The Makey Makey Module (video)
"More at http://littlebits.cc/bits/makey-makey
Make the mundane momentous with Makey Makey and littleBits! With the Makey Makey Bit, you can use everyday objects to trigger your Bits and control cursors on your computer’s keyboard, or even control your computer with Bits. Perfect for newbies and experts doing art, engineering, and everything in-between.
littleBits is the easiest way to learn and invent with electronics. Find out more at littleBits.cc"