A couple of years ago, a group of entrepreneurs successfully Kickstarted a little something known as the Chameleon Pen. In a nutshell, it's an art pen that changes color tone as you draw – for example ...

The Scribble Pen is a device that scans a color from a real object, turns it into an ink, and lets the user draw with it. An RGB color sensor scans the color and sends the information to a micro pump ...