"Safe and Durable: Made of food grade non-toxic ABS plastic and safe magnet material. Smooth surface and round edge design won't scratch or hurt your hands. Use ultrasonic welding process to ensure better tightness, rivets on the edges for double protection, and the magnet will not fall off easily, durable for long-term use. Stronger magnetism and new design: 66pieces have magnetic tiles magnet. Newly designed curves to prevent scratches, maintaining long-term bright color and smooth surface. LEARNING WHILE PLAYING - Children will spend hours playing with these magnetic toys. Good for developing color and shape recognition, creativity and imagination, practical and design ability. Perfect for preschool STEM educational games. PERFECT GIFT FOR ANY OCCASION - Perfect for use in family, daycare, kindergarten, preschool, junior grade schools, etc. Any child from 3 years old will love it and parents too. because this set of magnetic blocks will keep children entertained for hours"