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I'm not "into" them, but I still have one that I spin on my desk sometimes. I divide up my day between my spinner and pic related.
The infinity cube is really cool. For me, at least, it's much more satisfying to play with than a spinner. It makes quiet clicking noises that I really enjoy, but it's not as annoying as clicking a pen over and over.
I've never been a fan of the "baby activities" cube or 12-sided (I think?) thing. Those seem like they'd be really nice if they are your thing, though.