Four of a kind are shown face up. One at a time, the cards turn face down. Next the card backs change colour from Red to Blue, finally the spectator is asked what colour they now think the card backs are? Whatever the reply is, the Magician turns over the cards to reveal four of a kind, with totally different coloured backs. Very easy to do, everything can be examined at the end of the effect, comes made in Bicycle stock. Comes with interactive DVD Instructions.