John is 12 years old. John likes going camping. He has three good friends. They are Sarah, Amy and Mike. Sarah is 14 years old. She has long hair. Sarah likes playing the pipa very much. Amy is one year younger than John. Amy's hair is shorter than Sarah's, but her hair is longer than John's. Amy likes reading books. Mike is 47 kilograms. He likes climbing mountains. They are good friends, and they walk to school together every day.