Wonderfully Detailed Model: Our 5-Cylinder Radial engine model kits feature genuine precision-cast and machined parts in anodized aluminum and stainless steel. Each piece is accurate, detailed and directly correlates to assemblies found in modern, high-performance automobile engines. This is a superb introduction into engineering and mechanics. Complete Accessories: The kit contains over 230 parts. Each finely-crafted part is labeled, and packaged in custom foam carriers to ensure they are organized, complete, and undamaged. A clear, full-color instruction manual is included. While the engine is complex, step-by-step instructions – along with some patience – ensure excellent results. Simulation Model: A real electric motor inside the starter motor housing drives the 5-Cylinder Radial engine. The crankshaft, rods and pistons can be observed through special viewing windows. You can observe the operation of the 5-Cylinder Radial engine during the whole process. It is not only a beautiful decoration, but also a simulation dynamic model that can simulate the operation of a real 5-Cylinder Radial engine. Even when not in motion, it is an impressive machine to see. Excellent Learning Activity: This kit is not recommended for unsupervised children under the age of 14, due to its small parts. However, it provides a great opportunity for adults to spend time with children. The child will learn to understand and follow illustrated instructions, manipulate parts and basic tools, and to know the accomplishment of a job well-done. It fosters an appreciation for the ingenuity in today’s technology as well as the need for it in coming generations. Gifts: The 5-Cylinder Radial engine kit is packaged in a colorful, durable metal gift box. That ensures that the kit arrives intact. Plus, it makes an excellent presentation when given as a gift. It is a great idea for anyone interested in mechanical things.