Features: The color is bright and attracts children's attention. Develop children's hands-on ability. High-quality ABS material, thick material, smooth rounded edges, no burrs for durability. The edge of the lid is finely finished, and it is easy to fit tightly with no burrs and is dust-proof. The shape of the building blocks can be superimposed and can accommodate all kinds of small objects. The base card slot and the top protruding cylinder are very consistent, and the stacking is more stable and not easy to loose. Specifications: Condition:100% Brand New Material: ABS Color: Blue, Green, Yellow, Red(Optional) Size: Rectangular: Approx.16.7*8.3*6cm/6.6*3.3*2.4in Square: Approx.8.3*8.3*6cm/3.3*3.3*2.4in Weight: Rectangular: Approx.114g/4.0oz Square: Approx.63g/2.2oz Package List: 1*Building Block Note: Because there was a manual measuring ,the size may has 1-2cm/inch difference. The color may be slight different due to the condition or light or different monitor. Package List 1The color is bright and attracts children's attention. Develop children's hands-on ability. 2High-quality ABS material, thick material, smooth rounded edges, no burrs for durability. 3The edge of the lid is finely finished, and it is easy to fit tightly with no burrs and is dust-proof. 4The shape of the building blocks can be superimposed and can accommodate all kinds of small objects. 5The base card slot and the top protruding cylinder are very consistent, and the stacking is more stable and not easy to loose.