This is a great way to introduce children to building their first 2D and 3D shapes with magnetic pieces. The pieces are made from 30% eco material (wheat straw) which is much more environmentally friendly. They are supplied in 4 subtle colors with a neutral one on the reverse side. This color coding will help children to understand the concept of magnetic polarity. Designed for individual or small groups, this 24-piece set contains 12 equilateral triangles and 12 squares. The pieces are compatible with all existing Magnetic Polydron sets. Building guide included. Age: 3+.