Setup for elementary age kids

So I am looking to set up my kids first computer and looking for ideas or user experiences with kid-centric distros. My kid is in 1st grade and has used a Chromebook in school (though it sounds like he isn't really interacting with ChromeOS, and is usually in some application/platform that the school uses for a bunch of subjects). I run Debian with KDE on my desktop and laptop and a debian based server at home.

I want something relatively locked down or with decent parental controls. I've found a bunch of recommendation articles and videos but most are a decade old, recommending long abandoned distros, or are geared toward high school and college age.

Has anyone found a decent kid-centric distro that isn't abandoned or should I just manually set up a locked down Debian system myself? If you've used some, what was your experience?

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