If you have a printer and a webcam, head over to http://ge.ecomagination.com/smartgrid/#/augmented_reality and play around with this 3d toy.

Basically, you hold up a piece of paper with a special pattern on it in from of your webcam, and then you'll see a 3d animation that appears to be attached to the paper.

Very cool.

Um ... what kinds of things have you held up, Peter?

The pattern is provided for you on the site.

Oh, sure, rub it in that I don't currently have a printer OR a webcam.