When I was a kid, the ultimate fidget was simple soda tabs strung onto a string or key ring. I decided to make a soda tab DIY fidget toy for my kids to use to boost concentration and make teaching ADHD easier.
This fidget is so simple, it almost needs no explanation. This fidget is just a string of soda pull tabs added to a key ring. You could also use a necklace, bracelet, or zipper pull.