cuboro duo Old Version This is a rare, old version of cuboro duo, which is now discontinued. It is an opened item, but it is in excellent condition with hardly any signs of use. The standard set comes with 3 marbles, but I will include 4 extra marbles as spares. The following is an AI description: A brain-training toy that allows you to create a three-dimensional maze using wooden blocks and enjoy rolling marbles. - Brand: cuboro - Model name: cuboro duo - Material: Wood - Accessories: Building plan, 4 marbles - Number of parts: Blocks of various shapes - Country of manufacture: Switzerland Thank you for viewing.