Roy Walton’s Classic ‘Cascade’ Card Trick.
Effect: A packet of four cards is shown back and front and seen to have blue backs and normal faces. A short series of effects are performed with the cards, and a surprising climax reached when each of the four cards is shown to have their backs changed from their original form, to something completely different! The cards are unprepared and can be handled by the spectators if you wish.
Full instructions and cards are included with this trick.
More by Roy Walton.