This easy to manage effect is a reputation maker! Present a four of a kind to the audience. One at a time, the cards will turn face down, then face upagain as if by magic. What color were the backs - Blue? The backs have changed from blue to red. For the incredible climax, the backs changeagain and have become eye charts. The eye charts can even display a specialmessage revealing a spectators selected card! Amazing to see and easy to do!