bre pettis is founder and ceo of makerbot industries, and bre, thanks for being here. >> great to be here. >> i first started hearing about these things maybe eight to ten years ago and thought the idea was crazy, but here it is. how does this thing work? >> that's when i heard about it, too, and i really wanted one. they were so expensive back then, i had to make my own. >> how much were they? >> $100,000. now you can get one for $1,400. >> this is creating a piece of jewelry right now. >> what we have right here is on the back is a material. a big long spool of spaghetti. >> plastic kind of. >> material made from corn. it's great, renewable bioplastic and it's feeding through this tube into what's basically a super advanced hot glue gun, and it draws with the hot glue gun and draws layer upon layer, so when it's all done, we're going to have a bracelet in a minute. >> bracelet is a fun, cool application, but what are serious applications this can be used for? >> so we just had a story in kentucky of a doctor who used a makerbot before doing surgery on a 14-month-old boy. the boy ha