First there were the fidget spinners, then the squishies, then the pop toys, then the faux game controllers, bendable this-and-thats and a number of other hand-held items that my kids could manipulate ...

They might look like kids’ toys or office desk clutter, but fidget tools actually do something surprisingly useful. Whether it’s a popper, a spinner, a squishy ball or a twisty tangle, there’s a ...