1. 6 sides of strong magnetic suction, stable assembly, not easy to fall off 2. Smooth surface without burrs, does not hurt your hands, feel free to use it 3. The number stickers on the surface can be used for simple math operations 4. Can be used as teaching aids 5. Can build a variety of shapes, a variety of shapes, play imagination and creativity 6. Material: plastic 7. Applicable age: 4 years old and above children 8. Size: a single square 2cm, box about 10.3 x 8.3 x 2.5cm 9. Weight: about 230g (including packaging)