Necklace Prediction. Here is a different mental effect using dice. You show a little jewel box which you put on the table. Inside is your prediction.
From a glass containing four different colored dice, a spectator may freely choose one die. You too choose one of them. Ask the spectator if he wants to change with you or keep the first one.
The box is opened and you produce a necklace with a die linked to it.
The die is the same color as the one selected by the spectator!

Complete with first class material!