Keio University's robotics group have demonstrated a set of remotely-controlled facial elements designed to be worn as rings. These could be directly controlled by the wearer, or could be remotely controlled by a piece of software that was portraying a character that inhabited your hand like a sock-puppet or Senor Wences.
"First of all, this device resembles a toy. So we want to make it more like a character, like when children or their parents play finger games. That would enable a new form of interactive play. We'd also like to incorporate this robot into the way children use their hands to communicate with each other."
Robotic rings for wearable robotic interaction (via Neatorama)
