This is repeated with the spot on the other side as well, so that one paddle has two spots on both sides, and the other is blank on both sides. The spots can be made to jump from paddle to paddle as often as he wishes. Finally the routine ends with one spot each on one side of both paddles, and two spots on the opposite side of on one paddle.
The paddles can be handed out for examination if you wish. The apparatus supplied consists of the two paddles, with full instructions.