Use the camera and a homemade pen to write/draw on air!

- The first icon from the left allows you to make the pen activated.
- The second icon allows you to clear the screen.
- Move your homemade pen in front of the camera to write/draw on air.
- Make sure the tip of your homemade pen is distinguished from the stick.
- Make sure the tip is red.
- Make sure you are in a well lighted place.

Watch the following video to learn how to use this application.
http://www.youtube.com/watch?v=NNl_FFvY-oM

Enjoy!

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Video: