Optical illusions: G4G Paper Dragon

This paper dragon is an amazing gadget for your desktop.
You can find a template to print and cut out on many internet sites like this:
pontomidia.com.br/ricardo/greatweb/blue_dragon.jpg

This desktop creature was inspired by the work of Jerry Andrus to celebrate Gathering for Gardner 3 on January 16-18, 1998 in Atlanta, Georgia.

Gathering for Gardner is an eventmeeting to honor and celebrate the works of "Mathemagician" Martin Gardner

Who is Martin Gardner?
en.wikipedia.org/wiki/Martin_Gardner