The pulley and bracket set is a fun and engaging way for children to learn about physics and mechanics. They can experiment with different configurations and see how they affect the movement of objects. This set is also a great way to introduce children to the concept of force and how it can be used to make work easier. Features -Color:Multi -Material:PVC -Size:20.00X17.00X8.00cm/7.86X6.68X3.14in -This educational tool offers a hands-on learning experience for children. -Children will learn how to design and utilize pulleys through this product. -The use of this product will help develop observational, analytical, and critical thinking skills in children. -This product fosters an interest in stem fields, stimulate kids thinking ability. -Manufactured with safe PVC material, smooth surface, lightweight, easy to use. Package list: 3 x sets of Pulleys and Brackets Kits