Now available in paperback, this is part of a series featuring Pipkin, a cute, lovable penguin whose questions and adventures introduce key concepts such as time, depth and size. This story introduces the concepts of size and scale. Pipkin the inquisitive penguin wants to know how high the sky is and so, with a friendly albatross, he flies past a hot-air balloon, a space rocket and the moon -- but the sky is still much too high to him to reach the top.