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 Solid Colors 100-Piece Set includes 50 small squares, 4 large squares, 20 equilateral triangles, 11 right triangles, and 15 isosceles triangles. These tiles are opaque and brightly colored. All sets and styles are compatible with each other.