Fidget

[David Myer]

Lest this word relinquish all its usage, I am suggesting it now. It was certainly in vogue when I was a schoolboy. "Stop fidgeting, boy", but you don't hear it much these days. Perhaps it has been replaced by ADHD.

[bbeeton]

Maybe the frequency of use depends on where you're located. For at least several years, "fidget toys" have been nearly ubiquitous in the U.S.

For examples, see https://www.verywellfamily.com/best-fidget-toys-6744333 (not meant as an advertisement). This does mention ADHD as being relevant to the use of these toys.