Model car-building Erector set lets kids create a sleek, fast supercar--or 24 other exciting variations Durable metal components and real tools offer an authentic engineering experience, encouraging the development of science, technology, engineering, and math (STEM) skills Real 6V electric motor powers vehicle along on rugged off-road wheels The Supercar from Erector by Meccano is recommended for experienced builders aged 10+. Construction time of 1 to 3 hours. 4 AAA batteries required (not included).