This is certainly part of why I run Jellyfin, keep my kids and myself away from ads, control the media I expose my kids to. Weirdly, YouTube only works on Grandmas tablet, not any of the other ones 😒. I’ve also got adguard home running on an openwrt router

Edit: When I do finally give them access to the Internet, I’ll set up the browser with ublock origin, privacy badger, ghostery, maybe even noscript but they might not like the amount of fiddling they’d need to do