LED Throwies

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.

LED Throwie Links:
Download video documentation of the first throwies campaign
Make your own Throwies at Instructables
The first throwie mod : throwie on/off tab mod — from EverythingDigital
Mods tagged throwies on instructables.
Video tagged throwies on youtube.
Flicks tagged throwies and ledthrowies on flickr
Click this link to find out more about how and where to properly dispose of lithium batteries in your area.
Lost video documentation of the origin of the throwie