Content for kids strikes me as something you'd curate around an experience and value system you sell to parents. I can't imagine anything else would work very well.
Granted, this doesn't mean we shouldn't try to build filters. I'm just rather pessimistic about a hands-off experience with such software.
I think curation is the key. I sort of trust Disney to curate content for my kids. I definitely do not trust Youtube to do it.
I don't want my kids to be able to "discover" content. Why is that always the feature? Rhetorical question....I know the answer, engagement and stickiness. I just don't like the answer.
When I was a kid on 56k myself, the consensus was that their internet usage was monitored by adult eyes. Did curated libraries or content filtering step up to the mark?