I need an adjective to describe plots in old-time cartoons for children: no violence, aggression or stupid jokes, with characters that have their funny, sometimes dangerous, adventures but nothing that would prevent kids from sleeping.
I love cartoons that have all those things you don't want, Renatrix. As a kid, I would have described these peaceful cartoons as "boring". That's probably not the adjective you're looking for. Though it could sound a little dated, "mellow" might work to describe such cartoons.
cross-posted with defghi, who also thinks "mellow" could work.
EStjarn's "inoffensive" looks very good to me, Renatrix. Although I'm not a moderator, I do know that we're not allowed to ask for lists of words in here. This might be a good time to choose an option and allow this thread to die.