Compatible with all major brands Etarnfly classic building blocks are compatible with other blocks and are guaranteed to be 100% compatible with all major brands. Our building blocks are firmly fixed, providing a great play experience for little builders. 570 Piece Building Bulk: A full set of 500 pieces with vibrant and beautiful colors and various shapes, plus 70 additional windows, doors, wheels, and axles, allowing you to create imaginative models such as houses, cars, and animals. STEM Toys for Kids: Classic assembly toys can greatly improve children's fine motor skills, divergent thinking, and logical thinking abilities. Children can imagine and feel a sense of accomplishment during the assembly game. Safety and Durability: Etarnfly building blocks are made of non-toxic and durable ABS plastic and will not easily break or bend. All building blocks have a smooth surface without burrs, making them great creative toys for boys and girls aged 6 and up. 70-19Etarnfly 570 Piece Building Blocks Classic Building Blocks Wheels Axles Windows & Doors Pieces - Mixed Color Bulk Building Set for Boys and Girls Compatible with All Brands