HUI (Hoo-ee) Hinoki Building Blocks Unpainted Wooden Toy Daiwa Sangyo [Product Introduction] These building blocks can be used for a long time, changing the way children play as they grow, from simple block play to complex constructions. Combining "H" and "U" creates a space equivalent to one piece, and by inserting another piece into that space, you can create complex constructions that are not possible with regular building blocks. [Educational Toy] With a high degree of freedom, children can create new things based on their own creativity and sensitivity, making it an educational toy for taking the first step in active learning.