I don't think you were having multiple channels with 24hours programming for kids.
I will grant you I'm smearing this out over time. Prime time shows in the 60s weren't the same as during the 70s, local TV cartoon hosts disappeared by about 1975 (no more Binky The Clown, or Cactus Jim or ...), and certainly what got re-run before network news and after 10 or 11pm local news changed.
This is totally ignoring the 6am - 12pm Saturday all-kids programming. Mostly badly-animated cartoons, some weird live-action ("Land of the Lost"), but all aimed at and advertised to children. You could waste all Saturday watching crappy animation, then reeling around because you had lost your stereoscopic vision.
Among children, it's more dramatic - with kids watching 4.5 to 5 hours a day in the 90's.