Check out some of the cool LED graffiti being done by The Graffiti Research Lab . I'm not normally a supporter of graffiti, but these folks are doing some interesting stuff in a mostly non destructive way. LED Throwies are cool also look at the link for Laser Tag.
Instructions for GRL's LED stuff plus some other fun LED light projects can be found at the Instructables web site.
Instructions for GRL's LED stuff plus some other fun LED light projects can be found at the Instructables web site.