Machine Works 4 Cylinder Engine Construct a fully working model of a petrol car engine with ignition sound and illuminating spark plugs. About The model is fun to put together and the kit contains all the tools you'll need and over 100 parts to assemble the working model. It comes complete with its very own Manual, giving clear step-by-step instructions. YOU NEED TO SUPPLY: 2 x AA batteries Features & Benefits - Construct a fully working model of a car engine. - features transparent engine cases that make the moving parts visible during operation. - illuminating spark plugs and fully functional overhead cam valve operation - includes everything you need to build your own engine. - instructions and step-by-step diagrams Timelapse Assembly Video: https://youtu.be/1plVLyjs_vg