When I was 10, in the mid-to-late-1980s, I had a collection of short stories that was edited by Asimov. The one I'm interested in was the story of the creation of Earth told as though it was a school science project for an elementary school child.
On reflection they might have made our solar system too, but they were mostly interested with Earth. The story ended with the Teacher telling the student to throw it out, but the student planning to secretly keep it.
Can anyone remember the name of the book, or the name of the story itself? I'd love to find it again.