When the magnets snap together, there is evidence that energy is being transferred. This is because the magnetic potential energy, which is stored in the magnets due to their position and orientation, is converted into kinetic energy as the magnets move towards each other.
As the magnets move closer, the magnetic field lines between the magnets become more concentrated, and the force between the magnets becomes stronger. This results in an increase in the speed of the magnets as they move towards each other, which is evidence of the conversion of magnetic potential energy into kinetic energy.
Additionally, when the magnets snap together, there may be a sound or vibration that is produced. This is also evidence of energy being transferred, as the sound or vibration is the result of the kinetic energy of the moving magnets being transferred to the surrounding air molecules or other objects.