Hey,
I want to sell this puzzle called Mental Block by KMS Industries.
This puzzle is from 1968!
The goal is to form a 2x2x2 cube with all colored rods connecting each other.
The box said "America's only 3D Puzzle".
I guess meanwhile are a few more 3d puzzle out there. ;)
The top lid of the box is missing.
I will ship also to the USA!
Also have a look at all my other listings!