I have a fidget spinner. Actually I have a few. I don't play with them that often but they're kinda fun to mess around with.
But this article reminds us that toys to fidget with have been around a long time. The metal balls, (which are great to play with) to the worry stone, the stress ball, worry beads, and more.
What about the yo-yo? Is that a fidget toy? Or the Rubik's Cube? Maybe not.