Fidget Spinner Basics

Fidget spinners became wildly popular toys in 2017 worldwide.

A fidget spinner is a toy with a central ball bearing.

Spinners have two or more weighted lobes that spin around.

Many spinners are made of plastic or metal materials.

The central bearing holds metal balls for smooth rotation.

Mass is spread outward to increase moment of inertia.

Spinning acts like a gyroscope resisting orientation changes.

Rotation slows gradually but the spinner cannot spin forever.

Many spinners were made in China and sold worldwide in stores.

Users said spinners helped stress, but schools banned their use.

Studies showed spinners did not improve focus and could harm it.

Safety warnings advise supervision and caution for small children.