A small sword is placed through the center of a tube. A red ball is dropped in on top. The sword is visible at all times on both sides of the tube. As the tube is revolved, the ball does not fall out. When the top of the tube is separated from the bottom, the samurai sword is found to be threaded through the ball. The spectator may remove it and all parts may be examined. Includes the original box and instructions. Cracks to the external cover of the tube, else in good condition.