According to Adafruit Blog, a maker named Joseph shared an innovative fidget spinner design that takes the concept up a notch. It features two independent gear rings—an inner and outer layer that spin at their own pace. The knurled outer grip gives you better control, and the whole thing prints as one seamless piece with no assembly required. Expect a spin time of about 15 to 20 seconds, and you can customize it in single-color or multi-band designs.

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