The Funtastic World of Hanna-Barbera was looking for new concepts as it began its 4th season in 1988. What they got was their first preschool hero.
Fantastic Max lasted two seasons, and told the story of a toddler blessed with coherent speech and intellect at such a young age, aided by a robot from the planet Twinkle-Twinkle. I never saw the show, so I can only rely on the research I did. Let's serve up the intro:
FX, Max's alien doll sidekick, was voiced by Nancy Cartwright, who did some work for Hanna-Barbera in the 80's before a certain yellow-skinned juvenile made her famous, first on The Tracey Ullman Show. The voice cast also included Lorenzo Music (Garfield & Friends), Gail Mattheis (ex-Saturday Night Live), Phil Hartman (Pee-Wee's Playhouse), and Benji Gregory (Alf).