Tonight a young mom and her three-year-old son came to the library. They approached the desk. She greeted me and then looked down at her son, then said, "Say, 'excuse me, miss, where are the books about dinosaurs?'" He dutifully repeated (even with some eye contact!) "Excuse me, miss, where are the books about dinosaurs?"
I took them straight to the 560s, which I think of as just 'the 'dinosaur section' within kid's nonfiction. As we were walking over, his mom said to me,"I think he's never been in a library before, so I wanted him to learn what to do."
I've seen variations on this interaction probably thirty times now, but it never gets old.