KUMON PUBLISHING NEW Kumikumi Slope Educational Toy Toy 3 years old and up KUMON BL-22

This is a toy that uses various parts to plan the course the ball will roll. Start by creating a small course with few parts, and as you get used to it, you can gradually create more complex courses. Assemble, roll, reassemble, and repeat trial and error to develop creativity and the ability to think. Set contents: 17 types of parts, 57 pieces, 12 balls, 1 example collection