Recommendations for difference between boy/girl books - preschoolers

[wonderwoo]

Sorry if this has been done loads before, (I have searched but cannot find what I am after).

My 3 1/2 year old is always asking questions about why/how a boy is different from a girl. My answers don't seem to be satisfying him much! So I am looking for a book that explains all this in an age appropriate way. Have had a look on online, but not found anything I like. Does anyone have any suggestions?

I also have a nearly seven year old, so if anyone has any recommendations for older children, that would be great too.

Thanks.

I just got a book like that out from the library!
This one...
https://www.amazon.co.uk/Who-Has-What-About-Bodies/dp/1406336777?ie=UTF8&Versionn=1&entriess=0

Just in case the link doesn't work, it's called Who Has What? All About Girls' Bodies and Boys' bodies by Robie Harris

I will look that up. Thank you!

I think there is a series of them that give more and more information for different age groups.