A fun game to play....
When someone you know says their Social Security or credit card number etc.number out loud, memorize it and then later sing them ... "my favorite number in the whole wide world song".
"My favorite number in the whole wide world is 007.353.4478,
my favorite number in the whole wide world is 007.353.4478"

The look on their face is priceless, even invite them to sing along they know it by heart.