Christmas Tree Balls shows a multitude of images. When pointing a finger at this exhibit, each mirror ball reflects a slightly different image. No matter where the balls are placed, they will reflect some image, as long as there is light. The dark sections between the balls occur because all the light is reflected back and forth between the balls, and none of it gets to the eye. The exhibit’s side panel can be raised to reveal that the balls are in fact round, even though the dark edges make them appear to be crinkled.