Explore what‘s under the bonnet of your car! Build a fully functional and decorative model of a 4-cylinder engine (100 parts, model scale 1:3) in about three hours to make you and your family enjoy the technology. The complete package contains more than 100 components and a richly illustrated manual that leaves no questions about internal combustion engines and their possible applications. All essential engine parts move authentically: Pistons, crankshaft, camshaft, valves, ignition distributor, driven fan propeller. Even the ignition spark is simulated in this transparent working model. Improved model: Parts now in new colour, many of them in metallic look. High-quality loudspeaker for powerful engine sound. Engine size: 27.5 x 13.5 x 22.5 cm. The components fit together easily, either as interlocking pieces or with screws – no glue required. Additionally required: 2 x 1.5 V batteries (AA). Age: 14+