This tabletop demonstration kit is designed for middle school physics lessons to show the motion of an object on a vertical circular orbit and the role of initial height and speed in maintaining contact with a track. Key features and components Complete demonstration set: base frame, steel balls, circular track, plastic magazines, ball bags, and related accessories. Simple assembly: place the track on a desk and level the base frame for stable operation. Repeatable trials: ramps and magazines allow repeated releases and collection of steel balls for multiple experiments. Adjustable starting height: by changing the starting point on the inclined rail, students can observe how reduced initial height affects the ball movement. What this kit demonstrates and how it helps Visualizes core concepts: illustrates circular motion in a vertical plane, conservation of mechanical energy, centripetal requirements to stay on a track, and the point at which an object loses contact and follows a trajectory. Makes abstract ideas tangible: students can see the ball smoothly pass the of the loop when starting energy is sufficient, and observe the deviation and fall when starting height is too low. Supports inquiry learning: repeatable runs and adjustable starting positions make it easy to collect data and compare outcomes for classroom discussion or lab reports. Basic operation steps Place the circular track on a stable desk surface and ensure the base frame is level. Position a steel ball at the selected starting height on the inclined rail and release it without pushing. Observe the ball as it rolls through the loop in the vertical plane, passes the point if energy is sufficient, and continues into the ramp and bag. Repeat while lowering the starting point to identify the minimum height required for the ball to maintain contact at the of the loop and to observe when it deviates and falls. Performance and suitability Designed for middle school physics curriculum and handson classroom demonstrations. Engineered for smooth rolling and consistent results so students can focus on observing physical principles. Compact tabletop format fits standard classroom desks and lab tables. Suggested use scenarios Classroom demonstration: teacherled experiments to introduce circular motion and energy conservation, with live observation and guided discussion. Student lab activity: small groups perform repeated trials, record how starting height affects loop traversal, and plot results for analysis. Science fair or interactive exhibit: a visible, repeatable demonstration to engage visitors and explain the underlying physics. Included items Base frame, circular track, steel balls, plastic magazines, ball bags, and accessories for routine demonstrations. This kit provides a practical, repeatable way to demonstrate vertical circular motion and related physics concepts without requiring complex setup, making it suitable for middle school teaching and basic laboratory exercises.