Honestly, if you truly want to make a kid run society, there are two ways to do it.
The first is to make it a cabbage patch kids-like world where children aren’t human, but are a species that looks and acts like humans that happen to grow out of the ground. That eliminates literally all sexual questions the series could raise and removes the “when they grow up” issue since they would have matured as children and lead childish lives. But, for good measure, you add in regular kids who somehow discover this world through a magical portal or something. You need kids from our reality to ground the show and serve as a lens for the audience to experience culture shock.
The other way to do it is to go sci-fi and make it a planet where only kids exist and a planet where only adults exist. But the adult planet was killed by pollution or something(make it topical so idiots will think it’s deep) and they have to go to the kid planet to survive. The kids agree, only if they do all the boring stuff while the kids have all the fun. Meanwhile, the kids educate the adults on their way of life since kids did not kill their planet. It’s a little darker of a setting, but it’s doable.