Thought Transmitters trick
"Thought Transmitter by John CorneliusJohn Cornelius has done it again! The Thought Transmitter is an ingenious custom-made device which allows you to: instantly gain access the secret thoughts of another spectator. give the appearance of sending thoughts to your spectator Imagine, you have a spectator write down the name of a playing card, a number, or a symbol on a post-it note which is inside of a totally opaque wallet. The spectator now closes the wallet and wraps it with a rubber band. You never open the wallet but you know instantly what the spectator has written down. The spectator could even seal the wallet in a plastic bag and you still have access to the information!No sliding or moving parts! Everything may be freely handled by spectators without fear of detection! No impressions, carbon paper, magnets, center tears or sleights! Fools even the most knowledgeable of magicians or mentalists"