Light Entertainment ~ Free

Just because I think this is one of the coolest things ever...

LED Throwies by Graffiti Research Lab 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.

watch the video for some cool ideas...

story found on Shey.net
photo by urban_data on flickr