He could imagine an ant on a baseball thinking the edge of the world was where he couldn't see any farther. It would look just like a plate. Like the ocean, in fact. Peter picked up a pebble and threw it at a big wave. Then he remembered that Ocean was alive too, and he hastened to apologize.
People do that all the time.
I don't mind at all. Sooner or later every grain of sand comes down to the bottom, and all those that are on the bottom come up on the beach. It all has to be washed. Suddenly Uncle Peppercorn appeared, crawling out of Peter's pocket. I'm too little to tickle anybody.