Crafted with eco-friendly plastic material and permanent magnetic material that will not peel off easily. This brainteaser puzzle set helps you to enhance assembly ability to form hundreds of geometric patterns. Makes a great challenge for teen boys and girls, works as a relaxing stress-reliever or time-killer for adults. Due to the light and screen setting difference, the item’s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.