Wooden Wheels - 4cm, Pack of 50This smaller classroom pack of 50 varnished wooden wheels provides a perfect introduction to design, construction, and creative problem solving. Each 4cm diameter wheel is 1cm thick with a central hole of 0. 4cm, allowing students to experiment with moving parts and axles in hands on STEM and craft activities. Whether designing cars, conducting sink or float experiments, or constructing artworks, these wheels inspire rich investigation. Ideal for