Stones of the Mind (3350)

Five spectators each take a stone out of a velvet-like bag. Inside the
bag are 4 white stones and one black. The spectators have to hide their
stone in their hands so nobody (even themselves) knows who holds which
stone. After every spectator has taken one of the stones the mentalist
turns his back to them and the spectators can take a look at their stone
color to hide it again after that.

The mentalist now looks each spectator in the eye and  after he has done
that he can reveal which spectator hold a white stone and which out of
the five holds the black stone!

Comes complete with the five stones, drawstring velvet-like bag and instructions.