In the little video, it looks like a lot of it was just cannibalized parts. I'd be interested in the actual thought process that built the monstrosity (and I say that as a person who just loves that sort of gizmo work). When I was his age, I didn't know anything about proper electronics, and so I only took stuff apart and tried to figure out how to get it combined. I remember one of the big problems I had was figuring out enclosures, and frankly a $5 box from Target really would be the perfect thing; the other stuff likewise followed similarly.

Think of it as the Git-R-Done philosophy, like installing Postgres for a single two column table. It ain't elegant, but I wouldn't make a kid feel bad for trying.