MagWorld Toys Magnetic Construction Rainbow Colors-20 Piece Set. Create 2D and 3D Shapes, Figures & Architecture. STEM Play Age 3 and Up. Playing with Magnetized Geometric Tiles Teaches Shape Recognition, Spacial Recognition, Counting, Magnetic Properties and Other Critical STEM Skills. Magnetic 2D and 3D Buiding Encourages Brain Development and Creativity. Stack & Pack design! Quick clean-up; Neat storage; Easy on-the-go play. Patent pending design; Secured with grommets on all sides of the tile. Drop tested and torque tested to ensure the integrity of each sonic weld and rivet.