Merlins of Wakefield - It's always magic at Merlins

The spectator selects a playing card. The magician displays four transparent plastic cards covered with a pattern of tiny black dots. The cards are shown front and back. The spectator selects one of the plastic cards. Suddenly, a fully printed card face appears on the transparency matching the spectators playing card. Everything can be examined. You can cause the image to vanish again at the end if you wish.