The Dumb Kid is almost a trope nowadays: Luke Dunphy, Axl Heck, Jake Harper, Michael Kelso, etc.
But who was the first kid on TV that was unambiguously portrayed as downright dumb?
Mrs. Homie nominates Boner from Growing Pains. I proffered the Sweathogs, but disqualified them because, though they were ostensibly high school students, the actors portraying them were adult men.
Larry Mondello on** Leave It to Beaver** was a simple food monster, although it was the nature of LITB that sooner or later everyone of Beaver’s friends got the best of him, so maybe Larry wasn’t unambiguously dumb.
Although I believe Susan Olsen, who played Cindy, has called her character too stupid to live, or something to that effect.
I agree, but if the OP is excluding characters played by adults, Crenna was already in his 20’s when he played Walter Denton. (Ditto with Tom Lester as Eb in Green Acres.)
I actually was going to suggest The Beav himself for this but then I did think of how Larry was even dumber. I actually think a pretty strong case can be made for Lumpy Rutherford being one of the first dumb teen characters played by an actual teen.
I agree - I always wondered why, if Patty was such a popular girl, why she ended up stuck with that guy. (Not that a popular person couldn’t like someone who’s not handsome, but she obviously wasn’t that deep.)
Some 50 years later I still remember an episode where Patty had laryngitis and wrote on a series of placards answers to Richard’s questions. After about four answers
Richard “How do you know what I am going to ask?”
Patty’s placard “Because you are so predictable”
Richard (indignant) “I am not!”
Patty’s placard “Yes you are”