<P> The toy has been advertised as helping people who have trouble with focusing or fidgeting by relieving nervous energy or psychological stress . There are claims that a fidget spinner can be used to help calm people down who suffer from anxiety and other neurological disorders like ADHD and autism . However, as of May 2017, there is no scientific evidence that they are effective as a treatment for autism or ADHD . </P> <P> Fidget spinners are toys not unlike yo - yo or other skill toys, designed to spin with little effort . A basic fidget spinner consists of a two - or three - pronged design with a bearing in its center circular pad . A person holds the center pad while the toy spins . They are made from various materials including brass, stainless steel, titanium, copper, aluminium, and plastic . The bearings are generally ceramic, metal (stainless steel or chrome), and some are hybrids--such as ceramic balls with stainless races and cages . Each fidget spinner also has two or more weights on the outside that make it spin faster and stay balanced . Bearings can vary to adjust for the design's spin time, vibration, and noise, causing unique sensory feedback . </P> <P> Being a kind of a flywheel of a gyroscope in principle, fidget spinners come with similar effects enabling a player to pull various tricks and stunts while forces of a gyroscope take hold . A fidget spinner can be balanced on top of fingers, thrown and caught, and so on . </P> <P> As of 2017, the patent status of the various fidget spinners on the market was unclear . </P>

How much has the inventor of the fidget spinner made