Ages 6 to 12 years. Book and Audio CD. Frogs begin their lives as tiny tadpoles living in water. As adults, they live both on land and in the water. This book details the changes in a frog at the four stages: egg, tadpole, froglet, and adult. Illustrations, photographs, and easy-to-read text explain: facts about how the frog breathes and eats at each stage; differences in the metamorphosis of frogs in southern and northern climates; dangers to frogs from pollution, pesticides, and destruction of habitat. The CD is a narration of the printed book with entertaining sound effects to guide the reader. Approximate running time: 30 minutes.