Infinite Fidget Cube.

This little fidget is difficult to put down.  It is simply 8 cubes that are linked together so that it bends and folds in your hands.  Each fidget has 8 plastic cubes that are attached together.  Each section is meant to be able to pivot and fold in different positions so you can manipulate them in many different positions.  Basically it is a never ending folding toy.  You can open and fold it over and over again.