In order for it to work users hold it between their fingers, flick it and watch it go.

They are quite small and can conveniently fit into pockets - which is perhaps part of the reason they have become so popular.

Not to mention they only cost a few pounds. But more on this later.

Toys R Us says of the spinner: "Not only is it fun and interesting, it can also help you to focus on daily tasks and relieve anxiety, simply hold the spinner in your hand and spin it rapidly with your finger."

In addition to the spinners, there also cube shapes available.