Where do babies come from?

Jack: mummy, you just licked my lolly!
Mum: that's ok Jack,  I did make you after all!
Jack: how did you make me?
Mum: I grew you in my tummy
Jack: did daddy help?
Mum: yes jack, a bit.
Jack: did daddy put me in your tummy?
Mum: yes jack
Jack: how did he put me there mummy?
Mum: errr...
Jack: was it by magic mummy?
Mum: something like that jack yes!