Just because the first few tablet textbooks have shipped doesn't mean that members of Kno's development team are resting on their laurels. Product testing on the Kno tablet continues -- and it looks like Lego is doing the heavy lifting. They've put our favorite plastic building blocks to work by constructing a Kno stress tester out of Lego Technic parts. The robot checks both the Kno's ambient light sensor and the ability of its touchscreen to accurately track the system's pen swipes and flicks. Though not as intricate as a Lego replica of a 2000+ year old mechanical computer, the robot -- with its hypnotic pendulum-like motion -- is still a sight to behold. Check the video after the break.