Lift the first flap and the eggs hatch. From there the book opens out into a proper piece of natural history: how a bird feeds and shelters its young, why a hummingbird nest is barely bigger than a thumb, why a flamingo builds hers out of mud, and how penguins manage the whole business without a nest at all.

Over fourteen flaps and a set of die cut holes let a child peek forward to the next page, and Stephanie Fizer Coleman paints it all warmly enough to sit and stare at. The flaps are the durable kind that survives the fortieth reading.

Part of the Peek Inside series, which has spent years being the answer to a three year old asking a big question you were not ready for.