Playing with lights

Here are some videos of ways to use LED lights. GRL Graffiti Research Lab has been coming up with way to interact and paint with lights. in the videos one if of led lights attached to magnets and they make houses or metal objects in to a light bright.

Helen- here is the video i think of what you meant with the Laser TAGGING. they use a projector and LED lights to "catch tags" that are 20 ft tall on the side of buildings.

you can find more cool stuff they do at www.Graffitiresearchlab.com