Me: You want to see a neat trick?
9 y/o: Sure.
Me: Watch. If I hold a magnet in my hand and place it by the other magnet’s end, it flips around. Do you know why?
9 y/o: I assume it’s because the two ends are similarly charged, either positive or negative, and since a magnet repels like charges, the magnet you’re not holding flips so it can attract the opposite polarity of the one in your hand.
Me: Sure, sure. Or magic, but your answer works, too.
9 y/o: Cool trick, mom.