Ages 6 to 12 years. Following earthworms from birth to maturity, this book explains the stages of development these ancient annelids undergo before they reach adulthood. Children will be surprised to discover the enormous impact earthworms have on the environment. Illustrations and photographs illuminate topics such as: how earthworms live and move underground; earthworm cocoons; how juvenile earthworms survive; how earthworms reproduce; the importance of earthworms to the environment.