Lost and Found by Oliver Jeffers

There once was a boy...and one day a penguin arrives on his doorstep. The boy decides the penguin must be lost and tries to return him. But no one seems to be missing a penguin. So the boy decides to take the penguin home himself, and they set out in his row boat on a journey to the South Pole. But when they get there, the boy discovers that maybe home wasn't what the penguin was looking for after all...

Board book.