Kokonos, also famous for being a favorite toy of Sota Fujii, is a sophisticated building block game where you build paths for marbles to roll through, all in an invisible space. It's designed to nurture children's creativity. This item retails for 38,500 yen on the official website. I'd like to offer it to someone who wants to purchase it at a slightly lower price. The main unit and instruction manual appear to be in almost new condition. Purchased in the winter of 2025. I'm selling it because I only took it out once and it didn't capture my interest. ☆Awarded Good Toy 2021☆