FLYING RUBIK CUBE
A block decorated with colored squares like a Rubk Cube and a hole through two sides is dislayed impaled on a metal wand inside a cabinet.
The block is removed and covered by a square cover just large enough to fit over it.
The wand is replaced in the cabinet, which is covered in front by a sliding panel.
With a snap of the fingers the block is ade to fly to the cabinet. When the panel on front of cabinet is removed, the block is seen back in the wand. It is removed, and displayed once again.
When the square cover is lifted, it is seen to be clearly empty.