Nice package containing 4 cubes with 4 different colors on the 6 sides. The object is to arrange them in the holder such that there are 4 different colors along the length. Its a puzzle patented in Detroit in 1900. A statistical analysis of this puzzle shows that if you force 1 side of the puzzle to be correct, you have 1 chance in 14000 of the other 3 sides being correct! A great statistical analysis of this puzzle is now available with purchase. You math folks will love this work done by Puzzle Master Mike Czerwinski of Menomonee Falls, WI.