Sometimes when my back hurts, I lie down on the hardwood floor, put a hat over my face, and take a short nap. Which is how my grandson discovered me.
Hats fascinate him.
He'll forget this day. Then years later, when he's old and his back is hurting, some strange compulsion will make him lie down on the floor with a hat over his face. He'll wonder why he's doing this - and why it makes him feel like a happy little kid again.