Yeah I think that is possible, but right now I don't think nostr is kid-friendly. I'm not even really sure children should be anywhere near social media generally. Just an imo
Im just imagine like a YouTube client in the future with learning videos :) otherwise I agree with you!
The technology for that already exists - Peertube, for example. The problem is nobody is currently working on such content for a Peertube instance, because it doesn't give you money. Youtube does.
Peertube, with the foss hive-tube plugin installed pays the creator a little bit as well as the audience, plus does massive syndication of the streams/uploads.