Like many others, as soon as I saw the demo of Philips’ Drag and Draw gadget, I instantly wanted one of those. Now I saw that a group called the Graffiti Research Lab, inventors of the LED Throwies, created an ingenious device which resembles the Drag and Draw gadget, but in a setup which is a whole lot bigger: They created a Laser Tag system which can be used to project light graffiti on a surface, and you can draw in realtime via laser markers. (second half of the movie) What’s more, the source code is open, so people can build their own Laser tag system! Awesome! 
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