A book about our bodies and how they work.

How may bones do we have? -- Why do we get two sets of teeth? -- Why do we yawn when we are tired? -- Why do some kids have freckles? -- What happens to the food we eat? -- Why do we shiver when it's cold? -- What happens when we breathe? -- Why do some people have gray hair? -- What happens when we dream? -- What does blood do? -- How do we catch a cold? -- Why do we have skin? -- Mickey's mind teaser.