A set of universal combination building blocks that are fully compatible with particles, have a wide range of gameplay scenarios, and cover all ages. It not only allows 3-year-old children to experience the fun of building together, but also enables adults to complete advanced challenges in mechanical transmission, architectural aesthetics, and even electronic programming. Food grade ABS granules, ultrasonic welding with zero glue; Edge R3 chamfer, no burrs. Applicable scenarios: Parent child games, recognizing color and shape at the age of 3, completing a gear car at the age of 6, designing vending machines at the age of 10. Kindergarten/primary school, in conjunction with the curriculum package, carry out "Little Architect" and "Mechanical Little Doctor" club activities.