After reading a book about insects, Lucy and I turned into a spider and a caterpillar, respectively. We played for a few minutes, her eating "teeny tiny insects" (spiders apparently make a slurping noise for each insect), turning around in circles to make a web, and me crunching on a few leaves.
But the muddled mess on the living room table was singing its song of woe at me from the other room.
After a few minutes of play, I said, "Miss Spider, let's get our clean-up webs and go catch the mess up in the other room and put it away!" (with much excited heartiness).
"Okay!" Lucy said, and followed me, slurping, into the other room.
If only moments of parental insight happened that easily every hour.