300-Piece Building Brick Set: Includes 300 high-quality blocks in various shades like window gray, stone gray, dust gray, transparent, ivory, and walnut brown. Perfect for creative and imaginative building. | Multiple Block Sizes: Features a versatile mix of brick sizes, including 2×4, 1×4, 2×2, 1×2, and 1×1 studs formats for unlimited building possibilities. | Building Bricks are Compatible with Major Brands: Q-BRICKS are compatible with other leading building brick brands, allowing for endless building options and integration into existing collections. | Safe & Non-Toxic Materials: Made from premium, non-toxic ABS plastic, these building blocks meet strict safety standards, ensuring they are safe for kids of all ages. | European Quality Manufacturing: These building bricks are made in the EU, ensuring high-quality craftsmanship and reliable performance.