Starting with silly questions like the title, and moving on through increasingly-unlikely questions such as "do fiddler crabs ride a skateboard?," and "do fiddler crabs eat pizza?," children discover what fiddler crabs do. They don't need a skateboard - they can move sideways so shore birds can't catch them. They may not enjoy pizza, but they gobble up saltmarsh muck.

Using this question-and-answer format engages children immediately, and discovering just what fiddler crabs actually do satisfies...