We are expecting #2 and DS has already asked where babies come from even though he doesn't know about #2. I have to admit I didn't handle it the best way when he asked as I wasn't prepared. Anyways I know we will get a lot more questions when he hears about #2. Anyone have a good book recommendation for a 4 year old to help explain it. I know I saw an article or something a few years ago with age appropriate book recommendations but can't find it. TIA!