A tabletop Stirling engine that powers a mechanical music box, providing a combined visual and auditory demonstration of heattomotion conversion. The rotating music mechanism produces a pleasant melody while you watch the Stirling engine operate, making the learning experience more engaging. Key benefits Dual sensory learning: observe the engine in motion while listening to the music box, reinforcing understanding of the Stirling cycle through sight and sound. Educational and engaging: handson operation makes the working principle of the Stirling engine intuitive, useful for classrooms, hobby learning, and science demonstrations. Distinctive design: a novel combination of a precision Stirling engine and a mechanical music box, mounted on an elegant wooden base for a refined display piece. Durable construction: main components are made from aluminum alloy for strength and longevity; the heating cylinder is quartz glass with low thermal expansion and temperature resistance for reliable operation. Precise mechanics: careful workmanship and accurate transmission connections ensure smooth rotation of the music box and consistent performance. Technical and functional highlights Function: heatdriven Stirling engine converts temperature difference into mechanical motion that rotates a mechanical music box to play a melody. Materials: aluminum alloy main parts, quartz glass heating cylinder, and a wooden display base. Performance: stable mechanical transmission with fine detail work for dependable movement and sound. Practical use scenarios Classroom demonstrations for physics or thermodynamics to illustrate realtime heat engine operation. Desk or shelf display in an office or home as an educational conversation piece. Gift or project for hobbyists, students, and engineering enthusiasts involved in model building or STEM activities. This product blends functional engineering, precise materials, and aesthetic presentation to deliver a compact, handson demonstration of Stirling engine principles together with the charm of a mechanical music box.