A fun and funny picture book that would be a nice introduction to nonfiction books or reference materials. As a stand-alone, however, it has some defects. Some of the drawings made me just slightly uncomfortable, most notably the flamingo with a crab in its mouth. The crab is depicted as alive and wearing a distressed expression. The questions raised aren't always phrased so that there is a straightforward answer, either. For example, "Why do sheep have curly wool?" can't really be answered without touching on natural selection. "Sheep's wool is naturally curly. The curls create pockets of air that keep the sheep warm in cold and windy weather" explains the benefit of curly wool but doesn't explain why sheep happen to have this benefit. Most troubling, the last question asks why birds don't get lost when they fly south in the fall, and the humorous drawing shows a bird with a compass in the middle of its beak. The factual explanation states that migrating birds actually do have a kind of compass in their beaks. This leads to the conclusion that birds literally have compasses embedded in their beaks. Ack!