The Wishing-Stone Stories (Version 2) - Thornton W. Burgess

Tommy is a young farm lad with a keen interest in all animals. On the edge of the Green Meadows, he finds an old grey rock. He discovers that when he sits there, Tommy can wish and become any animal. From frogs to geese to beavers and bears, the young boy experiences firsthand the joys and sorrows of animal lives. (Summary by Jude Somers)