MaKey MaKey is an invention kit for the 21st century. Turn everyday objects into touchpads and combine them with the internet. It’s a simple Invention Kit for Beginners and Experts doing art, engineering, and everything inbetween[…]
Basically it’s a circuit board with a USB connector to plug into a computer, and it acts as a keyboard. It has several connectors (wsad and up down left right, plus a few others) that when they’re connected, translate into that key being pressed.
This kickstarter project was overfunded by about 20x, and for what it is, I think it’s pretty damn cool.