There’s also been several well-written RPGs lately that aren’t “kid RPGs” necessarily, but feature kids as main characters, so they’re great for kids to try.
Kids on Bikes is the stereotypical 80s-Amblin setting of kids (on bikes) getting into crazy adventures. Think E.T., Goonies, Stranger Things.
Tales from the Loop is a similar sort of thing but more sci-fi focused.
And of course I can’t forget Changeling: the Dreaming, the classic fantasy-based RPG that can have more adult themes but is, at its core, about kids (in the guise of changelings of various types) exploring together.
