In this case, I must reiterate that perpetual motion machines based on magnetism are fundamentally impossible and do not exist. If you insist on building a non-functional model, here is some advice:

1. Simplify the design as much as possible to illustrate the concept clearly.
2. Include materials or components that represent the key elements of the device, such as magnets, a rotor, and an inhibitor (the sheet of material).

4. Before beginning the construction, carefully consider how each part interacts with the others and how they violate the laws of thermodynamics. For example, you can explain how the rotor will eventually come to equilibrium with its surroundings and lose any net energy gained from the magnets.
5. Once the model is built, demonstrate its non-functionality by showing that it does not produce continuous motion or net energy gain. This should help prove your point that perpetual motion machines are impossible.