. >> while robert teter passes time playing music, that's not what amazed our crew.that teter builds his own guitars out of one of the few recreational resources allowed inmates. model book kits. >> all of these are stood up together and glued together to make this neck like this. and down inside of it, we have one radio, the tone control, have three controls down here, the set of batteries, and this one back here is the mic mixer. and we use magnets here to hold a lid on it. ♪ teter always includes one other element on his guitars. it's for his muse. >> everything i do, i dedicate to my wife. the blue heart is because we've been separated for 23 years now, and she's still with me, she's sticking with me right through this. i always put a blue heart on every letter i mail to her, every card i send her, and i put a blue heart on the case and the guitar. it's just our symbol, being separated so long. >> while music helps teter cope with life at holman, we met another inmate who finds his aggressive tendencies are soothed in the prison hobby shop, at the spring creek co