Reddit reviews How Are Babies Made? (Usborne Flip Flaps)

We had our second around the two year mark and Pirate Pete was the favourite book of the time (exciting new things, focus on the child not the baby)
https://www.amazon.co.uk/Im-New-Big-Brother-Princess/dp/1409313743

But these days (age 5) the Osborn series of lift the flap books would be better received (i.e. whats happening inside) - Ive not read this one, but we have others from Osborn
https://www.amazon.co.uk/How-Babies-Made-Flip-Flaps/dp/0746025025/ref=cm_cr_arp_d_product_top?ie=UTF8

Note:
The Osborn book has been flagged for inappropriate language by one reviewer, to which I would say, "What world do you live in where you can skip the body parts that having a baby requires?".
Also, one review says the "See inside the body" book contains the same pictures, but ours does not cover pregnancy (but is a worthwhile book to buy in any case)

This has good reviews
https://www.amazon.co.uk/How-Babies-Made-Flip-Flaps/dp/0746025025