[jacobolus]

Sure. There are kids who work in charities, political campaigns, family businesses, get involved in local civic or religious organizations, do creative performance like music/acting/dance, prepare for/compete in sports at a professional level, start doing serious academic work (attending conferences, writing peer-reviewed papers, working in academic science labs), invent stuff, publish fiction, compose new music, contribute to open source programming projects, do serious local journalism, .....

Any significant time commitment would be easier for a kid who didn’t spend all their time in school and had decent financial support.