L-Type Dual Cylinder Stirling Engine Model with LED Diode and Bulb for Science Experiment Educational Model Toy Collection

Double Cylinder Stirling Engine Generator Model with LED Diode and Bulb - L-Type Features:Stirling Engine: The engine can be lit with LED light-emitting diodes or bulb, allowing you to explore science while playing, observe the magical process of operation, and promote imagination and creativity. Full of metal mechanic