Hold the compact glass loop in your hand to heat the liquid with body temperature. As warmth transfers, the liquid boils and rises through the tubes into the top container. This is a looped and twisted glass device that contains a liquid that “cooks” when heat is transferred from your bare hand. When you remove your hand, the liquid cools and gradually returns to the large ball over a few minutes, providing a clear, ongoing demonstration of energy transfer. This toy demonstrates the steam-liquid balance. The colored liquid is a volatile mixture with a boiling point just above room temperature. Key attributes - Function: visually demonstrate heat transfer, boiling, and liquid return flow in a closed glass loop. - Material: glass construction with a looped, twisted design. - Design and performance: compact, hand-held form that responds to body heat for immediate visual feedback. - Visual appeal: colored liquid provides clear indication of phase change and movement. Use scenarios - Classroom or home science time to illustrate conduction, a phase change, and energy transfer. - Science fairs or STEM demonstrations to show dynamic, observable energy exchange. - Interactive learning activity for curious minds during study sessions or science clubs.