Magna-Tiles are a fun way to encourage your child's imaginative play and creativity. Designed for ages 3 years and older, this creative 3D magnetic building tile set is a great way for kids to practice and develop critical developmental skills through play. The Magna-Tiles Glow 32-Piece Set includes 14 small squares, 2 large squares, 8 equilateral triangles, 4 right triangles, and 4 isosceles triangles. In the light these tiles are a natural opaque color, in the dark they glow! All sets and styles are compatible with each other.