Stereoscopic images are created using multiple viewpoints of the same scene, using animation this can produce an interesting affect. Here’s a great example, but don’t look for too long! http://imgs.abduzeedo.com/files/articles/stereoscopic/images-3D-sans-lunettes-Stereoscopie-4.gif For more info see the Wikipedia article on Stereoscopy.

National foods cleverly made to look like flags: Flavorwire » Guessing Game: Edible Flags.