3 years & up. For young minds taking flat objects and constructing 3-D objects is a new and exciting discovery. The "X" shape tiles revolutionize the possibilities with your Magna-Tiles® creations. This 40-piece set features 9 free-moving magnets that allow you to build in any direction. Your child can connect the tiles and customize the structures they build. Ideal for teaching spatial relationships, math, logic, and problem-solving through creative building. Included: 12 "X" Shapes, 16 Small Squares, 6 Equilateral Triangles, 4 Right Triangles, and 2 "T" Shapes.