Children will enjoy working in groups or individually as they learn about colour and size differentiation. While developing motor and social skills. Connect these vertex balls and linking pins to construct a variety of geometric figures. Ideal for activities relating to 3D space, geometric shapes, polygons, symmetry and construction. While you may use linking rods with other small articles to help children learn more things about figures and counting.Includes 250 x rods (in five sizes from 5-14cm and five colours) and 80 x vertex balls (each with 1.7cm diameter and in five colours).