A
LED throwie is a small
LED attached to a
coin battery and magnet (usually with conductive
epoxy or
electrical tape), used for the purpose of creating non-destructive
graffiti and light displays. They were devised by the
Graffiti Research Lab as a new kind of graffiti art to be used on
ferromagnetic surfaces. Part of GRL's original campaign involved distributing throwies to a group of people, who were then encouraged to throw them onto a metal sculpture, called
Alamo, located at Astor Place on the isle of
Manhattan in
New York City.