Simplify the following text for a Grade 6 native English-speaking person.
Original: A very common source of magnetic field shown in nature is a dipole , with a `` South pole '' and a `` North pole '' , terms dating back to the use of magnets as compasses , interacting with the Earth 's magnetic field to indicate North and South on the globe .
Simplified: All magnets have what is called a magnetic north pole and what is called a magnetic south pole .