Chameleon Cards

The magician displays four cards say, AS, 2S, 3S and 4D. Three of the cards have Black spots whereas the fourth card bears Red spots. Squaring the cards in a stack he gives a tap and displays them again … the cards have changed to a run of the same suit … AD, 2D, 3D and 4D.
He turns the card faces down, mixes them, and puts them in a row over the table.  He picks one card and puts it in his pocket,  asking the spectators to guess the card he took. He takes the card out of his pocket and whatever the reply is, shows it is the AD. The other three cards he touches with the AD and turns faces up. Surprise … surprise … all three cards are now AD!
A self-contained trick, easy to do, and the cards can be examined at the end.
Comes complete with necessary cards and illustrated instructions.