Features: Cultivate the coordination and cooperation of the hands, brain, and eyes in this game, which is good for the fine motor activity and the development of physical functions. With bright colors, cute appearance and educational functions, it is suitable for children to have great fun while learning more effectively and improve their hands-on skills. Very interesting and is loved by children. It also can improve the relationship between parent and children, and spend leisure time with the children. Educational Purpose: great educational tool and can not only cause children to talk more and learn mathematics, but also guide them in terms and expression skills. Wooden Material: environmentally friendly, durable and easy to use. Specifications: Material: Wood Type: 3 Kinds Optional Size: As Shown Package Includes: 1 Set Roller Coasters Toy note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.