If you're looking for good vocabulary in books, some of the older children's books (older books that is, not necessarily older children!) are excellent. I don't remember now how old your DD is, but pretty early on, DS enjoyed hearing Mrs. Piggle Wiggle stories, some Roald Dahl, and Edith Nesbit stories. At least by the time he was three I think (although somewhere between three and four there was a "gap" where he didn't want to listen to anything he couldn't read himself, but we got back to them as soon as he was a pretty good reader).
If she really likes animal stories, there are kids' books of James Herriot stories (I think just short excerpts rather than adaptations, but I'm not sure), and Bill Peet is another good animal-story author.
