A boy named Tommy discovers a magical stone that grants animal transformations, and each adventure places him in another creature's life—meadow-mouse, mink, bear, and the like—where he learns practical hardships, community habits, and empathy toward wildlife. Episodes show him gaining respect for the natural world, making friends across species, correcting selfish impulses, and understanding consequences of wishes. The collection is arranged as short, illustrated tales that pair playful incidents with gentle moral lessons and vivid descriptions of meadow and woodland life, emphasizing responsibility, friendship, humility, and the value of honest work.