Probably the simplest mental feat ever devised, yet one of the most effective.
Three cards are placed on the table face up. One has a red spot, one a yellow spot and the last a blue spot. Victim now makes an ABSOLUTELY FREE CHOICE of one color. He can even change his mind.
No matter which color is chosen, the magician produces a prediction that matches the chosen color. Prediction is in full view of audience during the entire effect. Everything you need is included.