e-paper price tags, able to reflect the continually rising costs of Cap'n Crunch. Now the company is branching out with rather more high-tech but still tiny displays called Binem Active Matrix E-paper, which show a variety of interesting tricks in a series of videos from June that Technology Review is just now bringing to light. The two-inch, 170dpi screens can manage a 30ms refresh rate -- just fast enough to handle video -- and can do partial refreshing, changing only portions of the display. Perhaps most interestingly the screens can be backlit, meaning they use a rather different construction than traditional E-Ink, but exactly how they work has yet to be disclosed. Check out the thrilling demonstration after the break and see if you can solve the mystery.