Learn how car engines work by building one yourself. Kit includes more than 250 precisely detailed parts and pieces, exceptionally clear step-by-step instructions, and a transparent casing so you can see the action when the engine is switched on. Spark plugs light up, pistons move up and down, the camshaft opens the valves, and the crankshaft turns the belt, which spins the fan. Press the start button to hear pre-recorded engine sounds. Parts snap and screw together easily. For gearheads ages 14 and up. Finished size 9"w x 11"h x 9"d. Exterior box art may differ from what is shown.