stereoscopic images

http://psd.tutsplus.com/tutorials/tutorials-effects/how-to-create-a-stereoscopic-image-for-crossed-eye-image-viewing/

could be fun

http://www.mineralarts.com/stereo/howto.html

http://www.wikihow.com/Create-Stereo-Photographs

http://www.ehow.com/how_4968441_make-stereoscopic-image.html

http://www.google.co.uk/search?client=safari&rls=en&q=how+to+make+stereoscopic+images&ie=UTF-8&oe=UTF-8&redir_esc=&ei=HJ3MTOevL4-SjAe3rNXZBw