Tommy Kirk

Medfield's lovable but hopelessly absent-minded professor, Ned Brainard (Fred MacMurray), bounces back in this classic Disney film with hilarious new mishaps when he experiments with the amazing by-products of his startling anti-gravity substance, "flubber." Windows shatter, football players fly and thunderstorm materialize indoors as Professor Brainard fights to keep Medfield College from falling into the hands of ruthless land developer Alonzo hawk (Keenan Wynn).

With a shipwreck, the Robinson family becomes castaways on a lush tropical island. While the mother (Dorothy McGuire) isn't too happy about this fact, the father (John Mills) and the sons (James MacArthur, Tommy Kirk, Kevin Corcoran) are thrilled at the prospect of carving out a new life for themselves. In short order, the industrious Robinsons have constructed a treehouse with all the creature comforts and "utilities" of their home in Switzerland.