The Penguin is a kind of humpty-dumpty bird. He is far too fat to fly—the best he can do is to waddle. But his fat is very useful to him, for it is a kind of greatcoat, and helps to keep him warm while fishing in the bitterly cold waters around the South Pole. There is only one time, in fact, when the Penguin becomes lean, and that is when Mother and Father are bringing up their family. Then they seem to forget all about themselves, and while the little Penguins grow sleek and podgy, the poor old birds become so scraggy that their best friends scarcely know them.