Like most AuDHD people, I have distinct preferences for stim tools. My preferences may vary from your preferences. I use these tools while trying to focus at work, and so most (but not all) of these stim tools produce little to no noise. These are in no particular order.

1. Fidget Spinner: You may think fidget spinners were a fad a few years ago, but I’ve always liked the sensory feel of making them spin. Try lighter or heavier ones, like I have one that’s iridescent metal and quite hefty, it has a different feel from the plastic ones. You can get them from a lot of different places.
2. Bike Chain Keyring: These things are great because they’re small, silent, and you can carry one around on a lanyard. I recommend buying them off Etsy, like this one.
3. Click Bricks: These are magnetic bricks that you can click and unclick. They do make some noise.
4. NeeDoh Nice Cube: They make a variety of shapes, but the Nice Cube is my favorite. It’s kind of a cross between a stress ball and goo.
5. Fidget Cube: You can fidget differently with every side of the fidget cube. Some sides are silent, and some make a little noise.
6. Keyboard Fidget: These fidgets are made from mechanical keyboard switches. Usually, they’re blue switches, so they’re clicky. But some listings, like this one, allow you to choose your switch.