Show a die and two small empty cylinders with their lids. Ask a  spectator to mentally choose a number from the die and have him put it  inside the smaller cylinder and close this. Now, put it all inside the  bigger cylinder and close it with its lid. Concentrate for a few seconds  and, by reading it in the spectator's mind, reveal the chosen number.  To finish, open the two cylinders and show to your audience that your  mindreading was 100% correct.
 
• All can be given for examination.