Jeffers, Oliver

The small and mischievous creatures known as the Hueys all look and behave in the exact same way, and when one decides it wants to be different and knits a sweater, the others decide they want to be different and knit sweaters that look exactly the same.

While trying his best to help a penguin that has shown up at his door, a boy journeys all the way to the South Pole, only to realize that the penguin was never lost.