From Alan Warner:A yellow ribbon is draped over the cover and a black domino with recessed white spots is then placed inside the cover. (The weight of the domino forces some of the ribbon down into the cover, the ends of the ribbon remaining outside the cover.) The performer then pulls downwards on the ends of the ribbon which causes the domino to emerge from the cover, revealing that THE SPOTS ON THE DOMINO HAVE CHANGED FROM WHITE TO YELLOW!These moves are repeated with another domino and a blue ribbon, the domino’s spots changing this time from WHITE TO BLUE!Picking up the last domino, the performer drapes both the yellow and red ribbons over the cover, the domino is then dropped into the cover and the ribbons are pulled, revealing that the domino now has RED AND YELLOW SPOTS! The yellow ribbon is removed from the cover, THE SAME DOMINO (with red and yellow spots) is once again dropped into the cover, the red ribbon is pulled, and now the spots on the domino are ALL RED in colour!NO SWITCHES… The double colour-change domino is self-contained and is locked in the same manner as the single-change dominoes.FIRST-CLASS PROPSSPECIALLY DESIGNED FOR THE CLOSE-UP PERFORMERThe dominoes measure approximately 7.8 x 4.2 cms and have a hand-burnished, matt black finish.Lacking the colored ribbons, but any could be used.