okay but I bet the same concept would work if the distant magnet mounted on a plank from the top of the toy was on some sort of a crank mechanism that moved it rhythmically away and near and away and near from the other magnet.

Granted that wouldn’t accomplish the objective of perpetual motion because that crank mechanism would require its own power source like a battery.

So if that hypothetical crank mechanism would need a battery, might as well cut out the middleman and leave out the magnets, and power the car with a battery.