A company called Arduboy has just come out with what I at least think is an incredible electronic gizmo. Their founder, Kevin Bates and team have created the Ö Bluetooth Ring. The ring is actually 3D printed and features a 64x32 monochrome OLED display. This display allows for interaction with the ring, which is able to play animations, receive and send notifications to other users, and more. Bates is currently waiting on manufacturers to get back to him about mass producing the 3D printed ring. (Probably won't be mass produced via 3D printing). Further details about the Arduboy Ö Bluetooth Ring can be found here: http://3dprint.com/34627/o-bluetooth-ring-3d-printed/

Check out a picture of the ring below: