DIY Inline 4-cylinder L4 Car Engine Assembly Model Kit STEM Educational ToyFeatures:.Build your own car engine with a number of parts, which will be unprecedented stimulation and challenge.Switch on the assembled engine and the engine will turn. The valve opens and closes, the spark plug lights up, the piston drives the crankshaft, and the fan structure rotates. The dynamic components in this kit make the experiment real and interesting.Transparent shell design for observing and understanding the working process of the engine. The basic principle of a four-cylinder engine is that converting thermal energy of gasoline (diesel) into mechanical energy by pushing the piston to do work when the gas in the sealed cylinder expands..A great STEAM science toy to Develop children's mental thinking, and develop innovative thinking ability. Adults can collaborate with children to enhance parent-child interaction. DIY assembly toy can cultivate children's hands-on ability.It comes with clear instructions to guide children to gradually understand the structure of the engine and related mechanical knowledge. In the experiment, help the children learn the operating principle of the engine and understand the process of energy conversion. From small parts to complete finished products assembly process, exercise children's logical thinking, cultivate children's creativity and self-confidence..For over 8-year-old.Specifications:.Color: As Shown.Material: Plastic.Product Weight: 1200g.Package Dimensions: 37.5 x 30 x 7.5cm.Package Weight: 1500g.Packing: Graphic CartonPackage Content:.1 x Engine Kit.1 x User Manual