If one finds a kind rule the whole game is more of a headache than a challenge to the retentiveness. Something combinatorics remains. From 2 items purchased a box was a bit warped glued together, otherwise the quality is great. I would hope that the discs are provided on the outside with a color ring, z. B. red, green, blue, red, green, blue, ... in size classify the big wheels, if it is not overlie one another sometimes difficult.
