Books for siblings (4 and 7) to explain basics of pg/childbirth

[IzzyWizzyletsgetbusy]

Hi, currently 21+6 with dc3 and, naturally, facing some interesting questions from ds (7) and dd (nearly 5). I've been puzzling over how to explain it all in the appropriate level of detail, but not hugely confident with doing so.

Can anyone recommend some good, factual, age-appropriate books that would help me explain things in a simple, non-scary way? Don't mind getting a couple aimed at different ages since ds is a very capable reader (and quite into science/biology) so would probably appreciate being able to read it again at his leisure after we've been through it whereas dd is still plodding through phonics so might get more out of something a bit more basic.

I would love to tackle this soon as I'm aware I'm swerving their questions a bit , and I'm very conscious that my mum never had the talk with me and I do not want to be like that!!

Do a search on amazon. I just bought one for my step son (he's 6 next month) but I can't for the life of me remember what it's called - something about being a big brother. Sorry - baby brain seems to have taken over today!!!!

We have this from the library at the moment. It is too detailed for DS (2.10), and goes into simple detail for what is happening each month, looks like it might be right up your DC's street.

Can't remember the authors but you could try either mummy laid an egg! Or there's a house inside my mummy.