Explaining a new baby to a 4yr old

Amber

Hey y’all! We recently found out baby #2 is on the way! My 4.5yr daughter is super curious, and isn’t content with the just because, that’s how it is explanations. She always asks a million questions and needs all the details. She’s already asked before where baby’s come from, but now that we’ll soon be telling her there’s a baby in mommys tummy I’m afraid of how we’ll explain it to her. I of course want to be age appropriate, without having to explain how reproduction happens of course, but just not quite sure how to go about it. Does anyone have any books or tips they’d recommend??