2 years and up. Younger children can look at themselves and the world around them with the My First Polydron Mirrored 16 Pc. Set. These stunning mirrored pieces are ideal for teaching reflection. Ideal for younger builders, these large, chunky pieces are easy to join together to create unique 2D and 3D models. All pieces are fully compatible with other My First Polydron Sets. Set includes 4 squares, 4 frame squares, 4 equilateral triangles, and 4 frame equilateral triangles. Pieces measure up to 4.72" x 4.72" each.