The Machine Works 4 Cylinder Hybrid Engine is an educational and engaging build-your-own kit that simulates the workings of a modern hybrid engine, perfect for car enthusiasts aged 10 and over. This model features over 100 parts and demonstrates three modes of engine operation: internal combustion, eco mode, and electric-only mode. The kit includes illuminated components, moving parts, and a multifunction sound chip replicating engine and electric motor sounds, offering an immersive hands-on experience. Assembly requires no glue and comes with clear, fully illustrated step-by-step instructions and all necessary tools. Battery-powered (3 x AA, not included), this model provides a practical understanding of hybrid technology and mechanical principles, making it an ideal STEM project for children and adults alike.