My grandson asked why I always send him to school with a full water bottle when he never drinks it

"Because, sweetheart," I told him, tucking it into his backpack next to the uneaten apple, "you never know when you'll get thirsty."

He rolled his eyes. "Nan, I *never* drink it. It just comes home full."

"Exactly," I said, zipping the bag shut.

Punchline

"That way you're always carrying around a pound of potential."