so I'd like to put my vote in that some of them do need to be non-fiction! I admit my eldest was an outlier, but one of his favourite books at age two was called, "Turtles, Toads and Frogs". It's been long since loved to death, but it supports the point I'm going to make. There are some excellent nature books with good pictures and short descriptions that really appeal to young children and I would meet other parents at our local library who were shocked that I would be looking for good young children's non-fiction as well as fiction. This can be more true of boys (later supported by our Elementary School Librarian) and I have to admit that both my kids used to be boys, (but they'd like to be called "men" now!), but with the state of science education in some areas, I would encourage parents to try non-fiction out on their daughters and sons. A number of the books mentioned by people sound close to non-fiction, but it would be difficult for me to be sure of that just from the title. We need all humans in the next generation to be science and "true story" literate without scaring them with how desperate the planet is.
That's not to say they need to be non-fiction
Jay Angler wrote: The above mentioned school librarian insisted they were grade 7 reading level, but when a child loves a subject and has a parent willing to read with them, there's no better way to inspire a child than a challenging book about a subject they can relate to.