Two colored cubes, one red and one blue are shown and placed into a bag. The spectator selects one color, let's say red. The magician takes the red cube out of the bag and shows it to the audience. The cube is placed into the hand and a magic pass made over the hand.
 
The cube has changed to blue. This change occurs several times.
 
The final time a cube is selected and placed into the magician's hand, the performed blows on the hand and the cube vanishes, only be found in the bag.
 
Invented by Petrick c 2003