You can read someone's mind by guessing the number he or she is thinking of!

Ask a spectator to think of a number from 1 to 63 and write it on the paper, showing the audience but not to you.

Hand the spectator six cards each consisting of 32 numbers, and ask him to select and give back the cards that contain the number he thought of.

At the moment, you look at his eyes and guess a specific number, which is the same as the number on paper! Awesome!

You can also ask the spectator the number of someone's birthday or age, etc.

The size of the card is like a normal playing card.