Amadscientistgrandfatherinventsagenetictransformationmachineandhis4yearoldgrandsonaccidentallyturnshisbodyintothatofa30yearoldman.BabyBobbyescapesandrunsaroundtownashissiblingstrytocatchhimbeforetheirparentsgetbackfromvacationANDbeforethebadguysgettohimfirst.Themachineisworthalotofmoneyandtheyonlyhaveadaybef...