The Serious Physics Behind a Double Pendulum Fidget Spinner

I am going to make a prediction. As people start to get bored with their fidget spinners, they are going to start playing with these double pendulum fidget spinners. The normal spinner has a bearing in the center of some object such that you can hold it and spin it—moderately cool, I'll admit. But the double pendulum spinner has two bearings with two moveable arms.

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