They are the most popular item of the year with shops in short supply and parents going crazier than their kids in an effort to get their hands on one.

And, their popularity shows no sign of stopping.

Ryan Campbell posted a photo of his younger brother’s new haircut on Twitter on Tuesday.

The six-year-old from Northen Ireland has definitely taken his obsession to a whole new level by having a spinner shaved into the back of his head.

MY BROTHER GOT A FIDGET SPINNER HAIRCUT pic.twitter.com/yfiUgCYE9C

— bro has a ߷ haircut (@CampbellBeans) May 16, 2017

Fidget spinners are shaped like propellers and have ball bearings that allow them to spin. Kids challenge each other to spin them the longest or show off new tricks.

They have already been banned in some schools, with teachers claiming they are too much of a distraction and one school, the Carroll School in New York saying that they could cause a “serious injury.”