I needed a robot arm to try out a couple of the projects in a book I'm editing, Making Things See by Greg Borenstein: http://urbanhonking.com/ideasfordozens/2011/10/08/making-things-see-available-for-early-release. You can see a video of Greg's project here: http://vimeo.com/31698679I knew I wasn't going to be happy with popsicle sticks, so I combined two things to make robot arms that can have servos at one end:http://www.thingiverse.com/thing:6714 and http://www.thingiverse.com/thing:8131Print it out, attach a servo, and connect that servo to another Yazzo Servo Linkage or another one of these.