Ask Slashdot: Setting up a summer camp tech center

michaelknauf writes: I'm running a large summer camp that's primarily concerned with performing arts: music, dance, circus, magic, theater, art, and I want to add some more tech into the program. We already do some IOS game design with Stencyl, we have an extensive model railroad and remote control car program and a pretty big computer lab (about 100 apple machines) Our program provides all materials as part of tuition, so I've stayed away from robotics as a matter of cost, but I'd love to buy a 3d printer and do classes with that and the Arduino is cheap enough to make some small electronics projects sensible... where do I find the sort of people who could teach such a program as a summer gig? What projects make sense without spending too much cash on a per project basis but would be cool fun for kids and would teach them?