If you come from America, you will not think like people from Africa. Page 118 of our text manual shows an image called "devil's tuning fork", you can see the image below. When I saw this image, I was able to decipher how it was drawn and saw the details that made it appear to have three legs underneath instead of two. I couldn't draw this picture and it wasn't intended for an American, but an African tribesman could do it with no problem. Now look at the 3D box below which gives you the visual illusion of being able to put your hand inside the box. I learned to draw this in elementary school, but I'm sure if someone saw this in a different culture, they would be just as amazed as I was by the drawing of the "devil's tuning fork." Very