Tweet: This Rollerball Pen Lets You Draw Conductive Circu... Steve Hatch, November 22, 2013. This Rollerball Pen Lets You Draw Conductive Circuits zite.to/1emqgv1 Filed under Twitter. More to read December 30, 2013Tweet: JWT: 100 Things to Watch in 2014 http://t.co/9WfyY... December 19, 2013Tweet: R.I.P. The Blog, 1997-2013 via @jkottke http://t.c... December 9, 2013Tweet: This Week, 30,000 Classrooms Are Participating In... December 5, 2013Tweet: Amazon Turned a Flaw into Gold with Advanced Probl...