Thank you for viewing. This item is new and unopened. I purchased it as a gift for my child, but they already had a similar item, so I am selling it. Although it is new and unopened, please consider this item with the understanding that it has been in someone's possession. [Product Description] Tenyo TBB-04 Pentomino Square (Brain Block) A puzzle you can play forever Difficulty Level 4, for intermediate to advanced players, with a total of 16,146 possible solutions. Brain stretch. Take out the pieces and put them back in the case. That's all, but it's incredibly difficult. Shipping is planned via Yu-Packet Post Mini. Puzzle Puzzle game A puzzle you can play forever Brain block Brain block Pentomino Square