This is Pythagoras, an educational toy. Includes: Flat plates x 10 pieces 3D cubes x 10 pieces Total: 20 pieces. No box or instructions. Educational toy, wooden toy, wooden toy, toy, boys, girls, 1 year old, 2 years old, 3 years old, 4 years old, boys, girls, birthday, birthday present, birthday present, nursery school, kindergarten, children's center, elementary school, children, kids, junior, Christmas, Christmas present, popular, made in Japan, made in Japan