Our smartphones are cold, passive devices that usually can't move autonomously unless they're falling onto our faces while we're looking at them in bed. A research team in France is exploring ways to change that by giving our smartphones the ability to interact with us more (via New Scientist). MobiLimb is a robotic finger attachment that plugs in through a smartphone's Micro USB port, moves using five servo motors, and is powered by an Arduino microcontroller. It can tap the user's hand in response to phone notifications, be used as a joystick controller, or, with the addition of a little fuzzy sheath accessory, it can turn into a cat tail. MobiLimb is a research project by PhD student Marc Teyssier and his team across from French universities.