We were pretty open with where the baby will be coming out, especially since they would likely be there to witness it at the homebirth. I think I just started along the lines of "i'll be pushing the baby out, a bit like doing a big poo' (since they can relate to that! haha) and then as the questions increased, the more the details were expanded upon. My son fell over laughing the first time I said it was coming out of my vagina LOL. Trouble with such openness is they announce to everyone that the baby is coming out of mummy's vagina!

They ended up quite knowledgable actually about birth - the baby's position (from bub being breech and me trying all sorts of things to turn her!), how it comes out, they knew all about the placenta and cord etc. They knew not to lie down in labour, that mummy would be working hard to push the baby out etc.

I remember reading on here once describing the vagina opening up to let baby out as being like pushing your head through the neck of a scivvy. It stretches over your head and then goes back to normal. So I used that too.