Fidgets for middle schoolers?

Seventh grade teacher here, does anyone have any recommendations for age appropriate fidget toys for my middle schoolers? I currently co-teach two special ed ELA classes, and a majority of my students have a form of ADD or ADHD. I have found that giving them something to hold or play with helps with overall focus when we are working independently, but I have had such a hard time finding quiet, good quality fidgets, So far this year, I’ve used doodle pads, foam stress balls, and worry stones, but I would like to expand on what I have. I would be purchasing these with my own money, so anything cost effective would be fantastic. Thanks!