Explore magnetic principles with the colour coded blocks, while creating your own designs Children can explore how the yellow blocks attract to the blue blocks and vice versa Children can create vehicles with the freely rotating wheels and add drivers The spherical and cylindrical parts, in the larger sets, can also be used to make a complete sphere or cylinder, a great way to teach the properties of 3D shapes in a fun way Pack of 48 Suitable for ages up to 5 years.