ELI5: Explain Like I'm 5

Magnetic flux quantum

A magnetic flux quantum is a tiny bundle of energy that can act like a magnet. It is like a very small magnet that we can't see but it is made up of electricity and magnetism. When a big magnet is close to a magnetic flux quantum, it can make the flux quantum spin around like a tiny top. This spinning movement will move the electric and magnetic energy inside the flux quantum and this can help electricity flow better.