A delicate ring of Nano NeoPixels powered by an Adafruit Gemma M0, encased in resin.
I picked up some nano sized NeoPixels and turned them into a ring. Since the ring was so delicate, I encased it in resin. I attached the Adafruit Gemma M0 & battery to a cuff bracelet.
For more information, see the Adafruit NeoPixel NanoRing guide or the video below: