Fidget spinners may be fun toys, but there is no science behind claims that they help kids with attention and focus, according to a new review article. The review, which was published July 7 in the journal Current Opinion in Pediatrics, found that no research had specifically focused on the impact of these hot new toys on thinking, attention or recall. Furthermore, there are zero peer-reviwed studies on any aspect of fidget spinners, the researchers found.