Another fun thing you can do is put the iron filings in a jar with mineral oil. Give it a good shake, then put a strong magnet on the side. You'll be able to see the magnetic field in 3D.
Another fun thing you can do is put the iron filings in a jar with mineral oil. Give it a good shake, then put a strong magnet on the side. You'll be able to see the magnetic field in 3D.