Sylvester and the Magic Pebble by William Steig
A beautiful picture book about finding true happiness and being content with what we have. A donkey named Sylvester finds a magic pebble and makes a wish, but the wish goes wrong and Sylvester is separated from his parents. Frantic with worry, his parents search for him, but cannot find him. Ready to give up hope of ever seeing each other again, Sylvester and his parents are magically reunited. Winner of the Caldecott Medal.