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Currently you are able to watch "Big Baby" streaming on Hoopla, Pure Flix or for free with ads on Tubi TV, Crackle, Popcornflix, Freevee. It is also possible to rent "Big Baby" on Amazon Video, Google Play Movies, YouTube, Vudu, Apple TV online and to download it on Amazon Video, Google Play Movies, YouTube, Vudu, Apple TV.
When scientist Dr. Simon invents a genetic transformation machine, evil business men scheme to steal his billion dollar idea. But before they get the chance, Dr. Simon’s two-year-old grandson accidentally turns his body into a thirty-year-old man and runs off. Now his siblings must catch him and figure out how to change him back before their parents get home – and before the bad guys get to him first.