LED graffiti

Some people over at the Graffiti Research Lab have come up with an ingeneous form of temporary tagging using LED lights affixed to magnets. They're calling them "LED Throwies." It's a pretty simple idea, and very cool to see in action.

LED Throwies are an inexpensive way to add color to any ferromagnetic surface in your neighborhood. A Throwie consists of a lithium battery, a 10mm diffused LED and a rare-earth magnet taped together. Throw it up high and in quantity to impress your friends and city officials.

Link (via Digg)