Design Concept
This marble‑lever toy is designed to demonstrate fundamental principles of mechanics through a fun, interactive model. By leveraging a simple lever mechanism, it offers an engaging way to explore balance and motion.

Applications
This toy serves as an excellent educational tool for students and teachers in physics classrooms. It visually illustrates how levers work using marbles, combining hands‑on fun with cognitive stimulation.

Printing Recommendations
It is recommended to print this model using PLA or PETG, as these materials offer good rigidity. Set the layer height to 0.2 mm and the infill density to at least 15% to ensure the parts are sturdy enough to withstand repeated play.

Assembly Instructions
Once printing is complete, simply assemble the components. The lever and base should be connected using a short filament strand serving as an axle. This model uses steel marbles with a diameter of 10–11 mm; glass marbles of the same size can also be used as alternatives. Before use, adjust the balancing weight at the end of the lever to ensure compatibility with the steel marbles. To operate, place a steel marble on the top track, secure all movable parts during printing, then move one end of the lever. When you release it, the lever will automatically strike the slider, causing the marble to descend through the channel and land neatly in the collection tray below.