A small ball is placed in a clear box, the lid is put on the box, the box is covered briefly with a handkerchief, and when the handkerchief is removed- the ball has vanished!
Another effect: Leave the box empty. Place rubber bands around the box. Place the ball on top of the box. Cover briefly with a handkerchief, and when the handkerchief is removed- instantly the ball is now inside the box!
Same effect as Burglar Ball. Better price!