The Electromagnetic Bounce Ring Demonstrator is a portable electromagnetic teaching instrument. It vividly demonstrates core concepts such as Lenz's law, electromagnetic induction, and energy conversion through the intuitive phenomenon of "metal rings bouncing instantly above energized coils", allowing students to understand the physical mechanisms behind the magnetic field while "seeing" its effects. Experimental scenario example: Lenz's law verification: Open loop vs closed loop, compared to the latter which does not bounce due to the absence of induced current. Quantitative measurement of energy: Use a ruler to measure the bounce height at different voltages and draw a "voltage potential energy" curve.