This is a warm wooden puzzle made with the rich broadleaf trees of the Nishichugoku Sanchi Quasi-National Park, Hitomi Gorge. The T-puzzle, simple yet profound, is known as the "King." The combinations of pieces are more difficult than you might imagine, making it an intellectual toy that even adults can get absorbed in. The beauty of the wood grain and the smooth feel are unique to natural wood. It's a high-quality item that looks great as interior decor. Perfect for educational purposes, brain training, and collecting. - Brand: HIKIMI PUZZLE - Model Name: the T - Material: Wood - Puzzle Type: Wooden Puzzle - Design: Geometric Shape - Included: Box, bookmark, instruction manual Thank you for viewing. I believe I purchased this a long time ago during a trip. There is no damage, and it's a very beautiful item overall. I tried assembling it again this time, but perhaps my brain has gotten stiff, as it was quite difficult, and I gave up halfway through (^o^;) It's recommended not only as an educational toy for children but also for preventing dementia in adults! Thank you very much.