A magnetometer placed in the center of the carousel would represent the nucleus. A child, equipped with a bar magnet and a charged ball, would ride the carousel. The magnetic field from the bar magnet and the magnetic field from the moving charge would be detected by the magnetometer. They represent dipolar and orbital contributions, respectively. If we allowed the child to run around the carousel chaotically instead of actually riding it, the Fermi contribution would emerge, assuming the child could and would pass through the center.