Yes, all routers currently have this built-in. Most software outside of routers does, too.

Will it be perfect? No. But, for example, this is how content filters work at schools and just about every workplace. And it seems to be good enough for them.

And, this will work better than that. Because the key point is we're not blacklisting anything. Nobody has to maintain a list of banned websites.

> How do we decide what sites resolve as part of the Kid Internet?

Companies or people send an application. The website is reviewed by a human, and they get approved or denied. If you don't care to target kids, which most people don't, you do nothing.

So I don't have to do anything, nor do you. But Meta does. Google does. I'm fine with that.

And, this "board" or whatever who hands out Kid-Friendly certificates can also take complaints. Why not?

> Is there some process where a site submits itself for approval to be part of the Adult Internet?

No, this it the beauty of it. If you want to be a part of adult internet, you do nothing. You already are.

Every website is implicitly adult internet, and it naturally completely subsumes kid internet. So, if you're just making a blog or whatever, nothing changes. In fact, you don't have to update anything from right now. It will all still work. Because Kid Internet is new thing, and it's whitelist only.

> How do we stop the government from using this to stop access to parts of the internet it doesn't like?

Related to above, adult internet is what we currently have. Nothing changes. You and I won't notice, and we can't notice. There will be the free-range internet, and then the subset of the internet approved for kids.