Magician displays an empty black can with white spots and two silks, one black and one white. The two silks are placed into the can and then removed. Magician explains that the black silk changed to white and the white to black. This is repeated and when the audience realizes the magician is pulling their leg he puts both silks back in the can and instantly the spots disappear from the can. Magician then removes the two silks and they are now covered with spots. Comes with everything you need.