YM010X Effect: A ball is tied to it with two strings. You can set the ball free. Performance: Put the box in the palm of a spectator. Then turn his hand over， fingers facing you. Tie a knot over his hand， using one of strings handing from the sides of the box. Pull both ends of the two strings at exactly the same time. Magically， the ball will escape from the strings. Package Details Weight: 40.66 g Size: 14*11*2.5 cm Package Includes 1 × Box 1 × Ball 2 × String 1 × Instruction