Problema

The magician shows an elegant wooden box containing six black dice arranged in order from 1 to 6 and covers it with a lid. He then hands a spectator a dice cup, or any simple little cup (not supplied) with a die inside, inviting him to shake it and turn it upside down over the box, so that a random number is selected. Unbelievably, when the magician removes the lid, all the dice now show the exact same number.
 
The wooden box measures 8 x 3 x 6 cm (3.14 x 1.18 x 2.36 in.)
The performance can be repeated a second time and at the end everything can be given out to be examined.