Fidget spinners may be the hottest fad - literally.
Not content with annoying parents, teachers and principals, they're now bursting into flames, putting lives at risk and leaving children terrified.
Two US mothers say they bought battery-powered spinners, which can play music through built-in speakers.
The toys had been plugged in to charge when they caught fire, the spinners melting and burning their surroundings.
"We were about five or 10 minutes from leaving the house for the day. [My son] noticed it burst into flames and he started screaming," Kimberly Allums of Gardendale, Alabama, told WBRC.
"I was downstairs and all I heard was, 'fire, fire'. The fidget spinner wasn't smoking, it was in flames."
Ms Allums says she has tried finding the company that made the defective spinner - but with no success.
She has no information other than the box says "made in China".