Build a real working battery-powered 4-cylinder model engine with lights and sounds. Watch the spark plugs fire and the valves open and close. Learn how a real engine works and see how the pistons fire with the correct timing and watch the belts and fan turn. Now there are no more excuses - literally ANYONE can learn the ins and outs of a modern engine with the Motor-Works kit from Popular Mechanics. In fact, you can actually build a motor from the ground up, a fun, fascinating, step-by-step process, resulting in a real, working, 4-cylinder engine with absolutely authentic lights and sounds. So rev up your brain and prepare to learn things you never knew before about what goes on under the hood.

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