Although it's a lot more effort, if you care a lot about specific things being shown to your children, you could set up your own media server.

You could digitize an existing BluRay or DVD collection and allow your kids to view films and TV using a streaming service-like interface. These days most of the solutions don't even require you to transcode the films, you just RIP them to an ISO and put them on an accessible Samba share and as long as you rename the files to something approximate to the title of the film it'll fetch the metadata for you.