Jenn Jarmula, an elementary- and middle-school teacher in Chicago, recently hung a sign outside her classroom. This Is A Fidget Spinner Free Zone, it read. Fidget spinners–which dominate Amazon’s ...

What are fidget spinners? Fidget spinners started gaining popularity in March this year, and can be bought anywhere from pasar malams to department stores. Before fidget spinners, a device known as a ...