I got this kit of hand strengtheners, maybe you're looking for more traditional fidget toys but for me this kit was helpful, it comes with a number of different ones (including some silicon stuff which I love to squeeze) https://www.amazon.com/Strengthener-Adjustable-Resistance-Exerciser-Stretchers/dp/B07T9XFP5F/ref=sr_1_22?dchild=1&keywords=hand+strengthener&qid=1632358955&sr=8-22