When T was in First Grade we were driving home from school. He was sitting, all buckled up, in the back seat and the following conversation took place:
T - "Mommy, how did I get into your tummy?"
Frantically thinking back to the last parenting book - don't go into detail, keep it simple.
Me - "Well T remember how at school you planted a seed and the Radish plant grew?"
T - "Yes"
Me - "Well your Daddy planted a seed inside Mommy's tummy and you grew"
Silence for a few minutes and then:
T - "Mommy, did Daddy use a shovel?"