Wooden game/Crazy Four Key

First remove the cubes from the case and mix them up. Try to solve all three puzzles.
Puzzle 1 : Try to arrange the cubes back in the case with four different colors on each side.
Puzzle 2 : Arrange the cubes that there are four different colors on top, four different colors on the bottom, and two different colors on each side.
Puzzle 3 : Arrange the cubes that there are four different colors on top, four different colors on the bottom, and only one color on each side.
Instructions in English and Greek are included as well as the solution.

Difficulty : *****
The game contains 4 wooden cubes in a wooden case.