The Discovery Set Cubelets Robot Blocks Toy includes 8 pieces of magnetic toy building blocks that can be assembled to create various robots. Each block is made of plastic and magnets, and requires 1 lithium-ion battery to operate. With a weight of 1.41 pounds, this toy is designed for children aged 4 and above, featuring a robot theme that sparks creativity and encourages learning through play. The Cubelets brand ensures quality and reliability, making it a fun and educational toy for both boys and girls.