The performer displays a drawstring bag from which he removes six cubes, then hands them to a spectator.  Of the cubes, two have red, two have black and two have green spots. Three additional cubes remain in the drawstring bag, still unseen, which the magician says are his prediction.  The spectator is invited to choose any 3 cubes from the 6 cubes that they hold.  When the performer then takes the 3 cubes from the bag, he has predicted exactly the same colored spot combination as the spectator!