By Eric Carle
Monica wants the moon, so her father goes and gets it, and the page opens out four ways to show you how big it is.
Monica reaches for the moon out of her window and can't touch it, so she asks Papa to fetch it. He finds a very long ladder, carries it to a very high mountain, and climbs. The moon is far too big to carry, so he waits, and waits, until it has shrunk small enough to lift. He hands it to Monica and she dances with it. Then it goes on shrinking in her arms until it's gone, and a thin new moon comes back up in the sky.
This is a book your child holds and works, rather than one they sit still for. The fold-outs turn the size of the moon into something their arms have to do, and that is the only way that size means anything at all at two. It is also the whole moon cycle, told without a single fact: the moon is too big, then it isn't, then it shrinks away, then a sliver of it comes back. Your child gets the pattern in their hands months before anyone tells them the word for it. And the promise underneath is the one small children never tire of, which is that Papa said yes and went and did it.