1. Handson Learning: Experience gas expansion and condensation through heat transfer with a transparent looping glass tube containing boiling liquid. This interactive setup helps customers see how energy input drives gas behavior in a closed system. 2. Fascinating Science Toy: A looping glass assembly with boiling liquid is powered by the heat of your hand, offering a clear, engaging visualization of energy transfer in action without any external power source. 3. Energy Transfer Demonstration: When your hand is removed, the liquid cools and returns to the large bulb, demonstrating reversible energy exchange and the cyclical flow of liquid and vapor. 4. Boil Liquid with Body Temperature: Observe the liquid boil and rise through the tubes as heat is transferred from your body, providing a concrete example of heat transfer and phase change in a compact device. 5. Material and Design: Clear glass construction with a looping tube and a large bulb; compact desktop size designed for easy positioning on a table or desk; durable glass for repeated demonstrations; no electricity or batteries required. 6. Function and Performance: Responsive to touch, with smooth circulation and visible liquid movement that clearly illustrates gas expansion, condensation, and heat transfer in real time. 7. Suitable Uses: Ideal for classrooms, science labs, and home learning environments as a practical demonstration of basic thermodynamics and fluid dynamics in a selfcontained unit. 8. Compatibility and Care: Designed for standard educational settings; place on a stable surface; handle glass components with care to maintain performance and longevity. 9. Use Scenarios: Inclass demonstration of gas expansion and condensation during lessons on heat transfer and gas laws. Deskside exploration to observe how body heat initiates boiling and drives liquid motion. Science fair exhibit showing energy transfer, phase change, and looped liquid movement to observers.