Take up drumming.
It doesn't stop the jiggling, but the tapping rhythms are more pleasant for people to hear, especially if you lay down a funky swung beat New Orleans second line, or a Zutty Singleton style solo!!
Nope. Prohibited by company policy and hygiene regulations, now.
But the cubes do far more than even the most complicated-to-disassemble pen.
I often play with my Leatherman Squirt, but whipping a blade out in a meeting isn't as conducive to successful negotiation as it once was...
RGB keyboards serve zero purpose other than to keep your hands occupied, which is a market already saturated by other RGB keyboards... yet they're still making new ones... :shrug:
I still can't see the spinner as anything special, but the cubes do at least provide a variety of different 'fidgets'.