Here is a LED bracelet that lets you put on a light show and stay visible at night. The best news is you can 3D print and build it yourself, learning electronics in the process. The NeoPixel LED Bracelet is powered by a Trinket and has NeoPixel LED strips and a rechargeable battery. You will also need a slide switch, JST extension cable, and a few other parts to get started.
More items like this: here
Adafruit has shared more about this project here.
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