TubiTV has plenty of Kids shows, cartoons and family shows:

https://tubitv.com/category/kids_shows

And Family movies:

https://tubitv.com/category/family_movies

TuiTV is free to watch but they show different content to US/Canada/Australia users depending on IP, if you have a VPN and you change your IP you will see really different content. It is blocked in some European countries.

If you like anime, I really enjoyed Locodol, a Japanese manga series about "Local idols", they call them "Locodol".

It is free to watch but in Japanese with English subtitles. Search Crunchyroll for similar series.

https://www.crunchyroll.com/en-gb/locodol/episode-1-we-tried-starting-it-656533