Socially expressive robots that can express themselves with LED expressions have been around for a long time. Researchers at Cornell University have come up with a new approach to allow robot to show their internal state. They have made a soft robotic skin that uses goosebumps and spikes to show emotions.
As the team explains, this texture changing skin is actuated by embedded fluid chambers. Thanks to this approach, robots can express a variety of emotions. Yuhan Hu, Zhengnan Zhao, and Abheek Vimal are behind this project.