Lift-the-flap books guarantee a level of interaction between a book and a reader that facilitates deeper immersion in a topic. None better served here than the curiosity of a child regarding a soon-to-be sibling growing inside a mother's womb. The flaps here start small and grow with the baby's size. The baby isn't anatomically correct, but rather a joyful, playful idea of a baby growing until it's ready for the big reveal. The production details of the die-cut cover reinforce a tactile experience. The art is cute and quirky lending this book a welcome style and flair.