This book looks at the bodies and habits of insects, as well as different members of the insect family. Ages 4 to 8 years. There are over 200 million insects for every person in the world! This book uses stunning photographs of insects in their natural settings and explains their role in the environment. For ages 4-8. There are over 200 million insects for every person in the world! This book uses stunning photographs of insects in their natural settings and explains their role in the environment.