Mind Blowing Dice aka Problema by The Essel Magic w

The performer places an opaque plastic box on the table. Removing the lid he shows the box contains six dice placed in two rows. Dice are found to show one through six spots on their top faces. Lid is replaced. A spectator is given a seventh die; he rolls it on top of the lid of the box. Let us say the die shows six spots on its top face. When the lid is removed, all the six dice are found to show six spots on their top faces!