i take it back, this might be cuter

When my daughter Caroline was three she came to me with a small wooden box in her small hands and said, "Guess fwat is in this bockus!" I guessed caterpillars, mice, elephants, etc. She shook her head, smiled an unspeakably eldritch smile, opened the box slightly so that I could just see in, and said: "Darkness."

Hence this story.

- Ursula K. LeGuin, introducing her story "Darkness Box" in The Wind's Twelve Quarters