Puff the Magic Dragon (1978)

Jackie is a boy who is so trapped by his fears and doubts that he could not communicate with anyone. His condition is so severe that the doctors are giving up and the parents are losing hope for him to live as something more than a zombie. Then, a magic dragon named Puff comes to help Jackie by taking his soul force on a wonderous voyage to his island of Honah Lee. Along the way, they have adventures that nurture Jackie's imagination and courage in unorthodox ways. However, their arrival at Honah Lee is marked with horror as they see the land despoiled and desolate which leaves Puff powerless. Yet while trapped in his despair, Puff soons to his own astonishment just how well he has changed Jackie for the better as the boy responds to this tragedy in his own way.