The Boy Who Wanted to Be a Bear (2002)

To heal the sorrow of his mate after the death of their bear child, a male polar bear steals a newborn child from a nearby man and woman. The bears bring up the boy as their own, and he learns how to live like a bear. But the woman despairs over the loss of her child, and the man hunts down the bear family and brings the boy home. The boy faces the choice between becoming a boy again or learning how to be a bear on his own.