They Found a Cave (1962)
They Found a Cave is a 1962 Australian children's adventure film directed by Andrew Steane. The movie was originally made from a book by the same name by author Nan Chauncy. In 2010, a company called Argosy Films, set up a website to find the production crew and actors/actresses of They Found a Cave and Bungala Boys for the 50th anniversary.
More at Wikipedia.