Here is an example that you can play with on your own. It requires Flash Player 9 and a web cam.

1. Download and print this pdf.
2. Allow the flash file in the window below to access your camera and audio. *
3. Hold the pdf printout up to your camera, giving some distance between the paper and the camera. Move the paper around. You will see a 3D image mapping itself to the printout on the paper.

* (NOTE: if you click "allow access" and do not see your camera feed you must right-click or control-click on the flash window and change the camera setting to match your camera input - for built in cameras in laptops select USB camera)