The World's Biggest Etch-a-Sketch

This is really amusing: the world's biggest Etch-a-Sketch, that lets 3,000 people doodle and sketch at the same time.

This huge gadget is controlled by using two-sided paddles that signal sensor cameras, letting one side of the audience control the right knob and the other side control the left knob. The fun never ends.

If you want to sketch, but have no device, you can do it online - here (use the keyboard arrows).