Bring a model engine to life using over 100 custom parts! Watch valves open and close, spark plugs light up, and pistons drive the crankshaft just like a real gasoline engine. Featuring a rotating fan mechanism, turning crankshaft, and moving valves, this educational science kit offers a fun and entertaining way to learn the basics of an engine. With a fully transparent housing allows you to observe and understand how a real engine that works. HANDS-ON LEARNING Discover the inner-workings of a 4-cylinder gas engine with this 104-piece electronic build kit! Observe the synchronicity of moving pistons, turning crankshaft, rotating fan and belt, functioning valves and more. Featuring 104 custom parts, this dynamic battery-powered engine also includes replica LED spark plugs that illuminate in sync with the pistons. Suitable Ages: 8+ years.