My favourite book as a child was Hello, Rock by Roger Bradfield. I had Hello, Rock read to me so often I had it memorized completely (à la Hamster Huey and the Gooey Kablooie). Now I can only remember this much from it:
Hello, Rock. Gee, you’re a pretty rock. Are all these other rocks your friends? Is this one your mother? Is this one your father?
The book, decades out of print, has been known to fetch three figures on eBay. Perhaps I identified with it so strongly because the boy looked like me; I did not grow up with an interest in petrology.