TETRAD TÊTE by Ken Dyne - Book For Professionals or anyone wanting to finally

or anyone wanting to finally learn how to use one of the most misunderstood

though you will be able to see the card inside the case

or even sharpies

This type of coin can produce a thunderous sound

TETRAD TÊTE by Ken Dyne - Book For Professionals or anyone wanting to finallyWith little more than a pile of business cards and some pens, you are ready to perform a baffling mystery involving no more than ten members of your audience. Ten audience members are handed one of your business cards and are invited to make a drawing. The cards are collected face down and clamped together using a bulldog clip (if you'd like). Three members of the audience now flip open this impromptu 'art book' and concentrate on the drawing they