Children's novel —> Movie (1976) —> Movie (1995) —> Movie (2003) —> Play —> Movie (2018).
Also: Children's novel —> Sequel —> TV show
The novel
Adaptation Overdosed: First came the 1976 movie. Then, from The '90s until at least The New '10s, Disney produced at least one new adaptation of the book per decade, for either TV, the big screen, or stage.
