You don\'t need to be an engineer to build a working hybrid engine. All you need is this 4-Cylinder Hybrid Model Engine by Machine Works! This kit contains over 100 parts that you can piece together, using the very detailed instruction manual to guide you. It has a clear housing so you\'ll be able to see the engine working once it\'s all assembled, and you\'ll even see the spark plugs lighting up. Most hybrids run on a combination of petrol and electric power, but this one just needs batteries. Just pop in 3 x AA batteries and you\'re good to go. This engine model is great STEM play for absolutely anyone aged 10+. So, to feel the thrill of being an awesome engineer, order this Machine Works 4-Cylinder Hybrid Engine now! | Hybrid Engine Model by Machine Works