My favorite is to bounce my knees or swing my legs back and forth. I am 63 and while doing those things didn't get much attention when I was a child, seeing a grandma sitting in a wheel hair swinging her legs back and forth seems to cause others to look away. I do have 2 polished magnets. I will try taking them with me and fiddling with them. They don't make too much noise . . . 🙂