
Optical IllusionsAre the lines straight? Is there really a triangle here? Is this a duck or a rabbit? Look at it sideways. Are the lines straight? How many legs on this elephant? Are the horizontal lines equal in length?
Print this image. Which buttons are out and which are in? Turn it upside down and try again. Do you see a face or the word "Liar"? What do you see? Are there really any gray spots in these? Which vertical line is longer? Are the diagonal lines parallel? Do the diagonal lines meet? A wine glass or two faces? Are there any diagonal lines? A face or a saxophone player? Are the diagonal lines curved? Are the vertical lines equal in length? Do you see a young lady or an old hag? 
