[racket] RacketCon / hackathon question

I'm bringing my 16 year-old son to RacketCon on Sunday, since he loves Racket.  It's also the weekend of my college 30th reunion.  On the Saturday, he could go to the Racket hackathon, or he could go to my daytime reunion activities.  I was looking at the list of things going on at the hackathon, and I couldn't tell if he'd be in way over his head on Saturday, or whether it might be fun for him.  He loves DrRacket, it's hard to tear him away from it, actually, but he's relatively new.  He just started in June; he aced Gregor Kiczales' MOOC.  What opineth the hackathon masters?

Geoff