Den eksentriske professoren Philip Brainard er mildt sagt forvirret. To ganger har han til og med glemt sitt eget bryllup. Og i god tid før den tredje datoen blir bestemt lager han en oppfinnelse - en merkelig grønn substans - som han døper Flubber. Men en kveld stjeles stoffet fremfor nesen til hans robot Weebo, som har fått i oppdrag å passe på Flubber.

Bumbling professor Ned Brainard accidentally invents flying rubber, or "Flubber", an incredible material that gains energy every time it strikes a hard surface. It allows for the invention of shoes that can allow jumps of amazing heights and enables a modified Model-T to fly. Unfortunately, no one is interested in the material except for Alonzo Hawk, a corrupt businessman who wants to steal the material for himself.

Beleaguered professor Ned Brainard has already run into a pile of misfortunes with his discovery of the super-elastic substance "Flubber." Now he hopes to have better luck with a gravity-busting derivative he's dubbed "Flubbergas." Ned's experiments, constantly hampered by government obstruction, earn the consternation of his wife, Betsy. But a game-winning modification to a football uniform may help Ned make the case for his fantastic new invention.

Fatty invents a liquid with flubber-like properties which makes objects resilient and unbreakable. Unfortunately, in his rush to get out of the house to demonstrate his invention, he unknowingly grabs a jar of moonshine instead of the jar which holds his wonder liquid. To make matters worse, as he drives to the demonstration, a football-sized beehive falls from a tree onto the cargo bed of his truck . . .

Three friends embark on a quest to find the last remaining copy of Flubber (1997)