I AM FLABBERGASTED!

Can you figure out how this works?

1. Go to the link below. After reading each window, click on Fido Dido in the lower right corner of the picture.
2. In the last window type in your answer in the white box using the keyboard (there is NO cursor).
3. Watch the paper in the boy's hand. You will be amazed. And no, I don't know how it's done (for now, that is).

http://digicc.com/fido