If you give a second grader an engaging nonfiction text they may read it all at once. If they read it all at once, they will share all the cool facts. If they see how cool the facts are, they will want to write them down. If they write them down, they may want to find more cool facts to add to their collection. If they keep writing and adding to their collection, they think of more things they want to know about. If they have more things they want to know about, they will need more books. If they have more books, they will read the books.