Possible prior knowledge to Kindergarten
Magnets attracted to metal - refrigerator magnet, metal shavings, magnet doodle, Thomas train, Various magnets, Magnetic calendar

Magnets interact with each other and certain kinds of materials.

Electricity and magnetism can exert a force on each other.

Sixth Grade
Magnets interact with some metals
Force of magnet is not dependant on its size
Earth has north and south magnetic poles
Like poles reple
Opposite poles attract
Electricity and magnetism interact…
Compass
Break a magnet in half and you have two magnets each with poles
Computer disk data can be erased with a magnet