Another Oh Well...
When you buy a card for your grandson that says they're great,
But when you go to fill it out it says Great-Grandson,
You do what your grandparents and parents would have done that you would have rolled your eyes at:
X out the dash, underline the word great and give it to them anyway.
It's okay.
You're old.
Let them laugh and you can laugh along with them.
Life is way less complicated when you don't fret over that stuff any more.