It's not always a question of why -- sometimes why not will suffice. The rolling bot above relies upon the Mindstorms NXT light sensor's ability to read the contrasting colors on the iPhone display. After some simple programming and DIY tomfoolery you can drive the robot from the comforts of your WiFi-enabled web browser. Overkill? Oh hells yeah, but at least now your iPhone will serve a purpose after Monday. See how the kids at Battlebricks did it in the video after the break.