This is how we spend 40 minutes or so before a nap. We sit on the floor with me right behind her. She pulls a book off the shelf, I read and set it aside, and she pulls another, and another, etc. until she yawns and rubs her eyes or bursts into tears for no obvious reason. Then we cuddle and rock and she drifts sweetly asleep.
You can see a bigger picture (if you’re curious about the titles) here.

