Elephant Boy is a 1937 film based on Toomai of the Elephants from Rudyard Kipling's The Jungle Book. The story can be read online here. The movie stars Sabu in his film debut. It won the Best Director Award at the Venice Film Festival. This has wonderful scenes of colonial-era India and was fun to watch.
DVD Talk calls it "an appealing colonial adventure with elements of both documentary and fantasy" and says it "enchants audiences from the moment Sabu scrambles atop his beloved friend's enormous head". TCM has an overview. Rotten Tomatoes has a critics score of 100%.