Puzzle blocks made in Japan from natural beech and domestic natural oils.
 
Uniquely shaped "J" blocks with a ratio of 1: 2: 3. These can be used by younger children for building and by older children to create challanging 3D puzzles. From Jino: "While touching, the spatial cognitive ability and imagination are naturally stimulated, and along with the discovery of unexpected combinations, mathematical ability and artistic sensibility are nurtured." These are also fun for adults and beautiful for everyday display.