(plastic with internal parts and magnets, 2.7 inches)
Plates inside a hollow cube that have white and red dots on them can be manipulated by tilting the cube;
the goal is to make only white dote shown in the holes that have the pattern of a standard die.
The 1993 patent of J. Bognar and E. Rubik of a similar mechanism with plated with a single hole on each side into which a finger can be pushed.
describes the configuration of the plates and gives a solution.
Here is the English portion of the directions from the back of the box:
from: www.uspto.gov - patent no. 5,184,822