businesses, oil fields, related industries. close to $500,000 a year for the sales. since i've been here, for five years. how long before you have all this cut, sewed up? >> by 10:00 tomorrow morning, cut up, sewed up. probably about another three hours. >> it's one of the most productive jobs here. one of the only places you can make something and somebody else assigns a dollar value to it. so you have bragging rights. so to speak. >> you have to have work. you have to have a purpose. and sometimes here they lose that purpose. particularly the ones that have, you know, the life sentences. >> the spring hill hobby shop offers additional opportunities for eligible prisoners to learn skills and work on personal projects. >> those model ships that are sailing ships, i think i've built like ten of those. those things take anywhere from a year to a year and a half to build. but they're a lot of fun.