There's a version for kids (0). Contact approvals go through the parents, there's a weekly report so you see who they spoke with, settings to prevent link sharing, curated GIFs (but that's as curated as YT Kids), etc. It's the only reason I signed into FB in the past decade.
Obviously they can just set up their own fake FB account and lie about their age (which frankly I already told her to never sign up to anything with any real information) but the rest of their friends need to as well for it to be of any use. At this age, we're not there yet