http://3dimka.deviantart.com/art/3D-Stereogram-Tetris-36795242 (http://3dimka.deviantart.com/art/3D-Stereogram-Tetris-36795242)
I don't have the 3D glasses I can't play it. But if you have it, why don't have a try?
Thanks for the link. It is interesting :)
You don't need special glasses ,you only have to see the 3D objects in the picture with your eyes .
I tried it. But it is a little straining !
http://en.wikipedia.org/wiki/Magic_eye
http://en.wikipedia.org/wiki/Autostereogram