Sitting at the kitchen table at my parents' house he asked how babies got into their Mummys' tummies. I knew it was going to come at some point but I really wasn't expecting it yet he's still so young (5.8)(but obviously growing up fast)
Anyway I told him about Mummys having eggs in their tummies which he was happy with for a few moments. Then he asked what makes them start to grow into babies
I have to confess I wimped out of answering that one as dd was (conveniently) vying for attention