There are many companies selling wearable devices these days. You could always build your own with the right tools. FLORA V2 happens to be a DIY platform for wearables. It is Arduino compatible, which means you can build all kinds of fun wearables with it. The FLORA is small and fabric friendly. It has a micro-USB port. It is beginner friendly, so you are going to have a difficult time killing it by making simple mistakes.
Flora v2 has a RGB NeoPixel for colorful lighting. It works seamlessly with various FLORA accessories. You can find yours on adafruit.com.
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