that's not children's media tho, you're conflating media that's kid friendly with media that's made for kids. the creators of avatar specifically said it's not for kids. it just happened to be on nickelodeon.

kid media would be something like bluey. it's made for kids, but adults can also watch it with their kids if they can tolerate it.

mario is something an adult can play just because they want to enjoy it for its merits