Color Gradient Magnetic Film: a favorite device in my collection- making the invisible visible and revealing the hidden beauty of the physics in our everyday world. The field structure of six magnetic objects can be seen here. Staring with a simple dipole neodymium in the center and going clockwise from the top left: fridge magnet with stripe pattern, magnetic rotor of a small motor, ring of poles of a rotor for a stepper motor, vintage ferrous classroom “dipole”, and a coded interlocking neodym