<Tr> <Th> Materials </Th> <Td> Brass, stainless steel, ceramic, titanium, copper, plastic, latex etc . </Td> </Tr> <P> A fidget spinner is a toy that consists of a ball - bearing in the center of a multi-lobed flat structure made from metal or plastic designed to spin along its axis with little effort . </P> <P> Fidget spinners became popular toys in April 2017, although similar devices had been invented as early as 1993 . The popularity of the toy among children and teenagers has led some schools to ban use of the spinners in class for being a distraction, while other schools have allowed the toy to be used discreetly . </P> <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>

When did the fidget spinner first come out