This is two tricks in one! Both giving the effect of having extra mental powers whilst in reality both are completely self working.
1. You turn your back whilst the spectator rolls three dice. They total the faces, and hide them from you. On turning around you can immediately tell them the total that they have reached (different every time).
2. You hand the spectator a sealed envelope with a prediction inside. The spectator rolls three dice, and based upon the numbers rolled looks up a word from the book or newspaper (provide your own books) based on page, line, and word number. When the check the prediction in the envelope, it is perfectly correct.