Thank you for viewing. This is an educational toy from Nathan, a French company handled by BorneLund. Using the basic three-dimensional shape "cube," you can develop spatial reasoning skills such as shape, size, depth, spacing, and direction. Set contents: ・Problem cards x 18 ・Wooden blocks x 28 ・Card stands x 2 Retail price: 6,930 yen There is no instruction manual. I haven't used it much because I have similar educational toys. The toy itself is in very good condition. Please only purchase if you understand that this is a used item.