Fidget spinners beware. An 11-year-old Arizona boy was admitted to two different hospitals over the course of 16 hours after getting a three-pointed fidget spinner shaped like a ninja star stuck on… ...

The TSA’s verdict: Fidget spinners are toys and ninja stars are weapons. Ninja star fidget spinner? Weapon. View this post on Instagram. The (actually sort of funny) ...

'Satanic' fidget spinner banned from flight over safety fears Transportation Security Administration shares image of confiscated ninja star spinner on Instagram.

Therefore, the fidget spinner's price premium ($15 on Amazon) over other common fidget objects such as pens, pencils, balls and coins probably isn't due to massive research and development costs.