This was SO easy, yet so entertaining for the kids to do Take a piece of paper, and fold it in half, or, draw a faint line in the middle. Get the kids to paint on one side, using quite a decent amount of paint, then when they are done, fold it over and squish together. The mirror image of their painting will show up on the other side! If you are so inclined, this also makes a beautiful butterfly, you cut into a butterfly shape while folded in half, then you have matching wings.