One of my favorite things that was shown to me during my elementary age years was an optical illusion. It was the very famous Rubin Vase (pictured below) which you can see in either two ways - as a vase or as two faces that are facing each other.
"Beautiful" the only word I can describe this work
This person has creativity, imagination and the skill to magnificently paint what his boundless mind dictates to him ! I wish I had that enviable skill of being able to draw and paint what I'm feeling and thinking - amazing
Al Seckel: Powerful visual illusions Al Seckel, a cognitive neuroscientist, explores the perceptual illusions that fool our brains. Loads of eye tricks help him prove that not only are we easily fooled, we kind of like it.