> > The basic shaping is estimated to have taken around 200 hours, and in total the recreation likely took more than 370 hours.
> Nearly a year of "full time" work at 40hrs/week went into this
Sorry, I think you may be mistaken? From the section you quote, it looks like it's about 370 hours, or 9 weeks of full time effort. That's still a lot, but certainly not nearly a year.
Yes you are right not sure how I flubbed that one. Made an edit in my comment.
I can also imagine that someone with a lot of practice might be significantly faster than some unskilled researchers.
I also don't think it rules out it being something for a child. It's not so rare to do big projects for you kids even today, over many evenings and weekends. And when you don't have any books to read or screens to watch...