Haynes Build Your Own Internal Combustion Engine Kit

Haynes Build Your Own Internal Combustion Engine Kit – 4-Cylinder Model Rev up your curiosity! This detailed working model lets you build a transparent 4-cylinder engine with over 100 parts. Watch the pistons move, the crankshaft spin, and the spark plugs light up with realistic ignition sounds! Great for STEM learning, hobbyists, or gearheads of all ages (14+). Includes electric motor, step-by-step instructions, and everything needed to assemble your own mini engine (batteries not included). Condition: [Insert “Complete & Like New” / “Opened but Complete” / “Parts Missing” as appropriate] Perfect gift for future engineers or automotive fans!