Haha where do babies come from? (6 year old eyes)

Sarah • I have two beautiful children a boy and a girl. TTC baby #3
So my son is a little curious but I don't know what to say. He might have to be in the room when I deliver. Honestly he might have his 3ds or tablet stuck to his face the whole time. (Unless you have ideas, he doesn't color) or do you think I should find someone to watch him? My husbands family might step up more than my family.