- Educational physics demonstration: Not only shows a pendulum, but also demonstrates the laws of momentum and energy conservation in a clear, visual way. - Interactive science toy: Pull back one or more of the balance balls, release them, and the same number of balls swings up on the opposite side, illustrating energy transfer. - Stress relief and focus aid: When studying or working feels tiring, stirring the balls to hear the clinking sound can provide a calming, sensory break. - Desk-friendly decor and gift: Suitable for home, study, or office desk display; also makes a thoughtful birthday gift or science toy. - Practical design and performance: Delivers a reliable, engaging demonstration of physics principles in a compact, desk-ready form. Use scenarios: - Classroom demonstration: A visual aid to explain pendulum motion and conservation laws to students. - Personal desk use: A quiet, tactile activity to improve focus during study or work breaks. - Gift or collection: A unique science-themed present for students, colleagues, or enthusiasts.