Little Treasures Cube Mega Minx, 12 Sided Black, Assorted Color Layer, Speed Mind challenging, exercises your memory and hands on skills is a perfect educational toy that will keep anyone busy for long periods of time Standard structure comes pre-lubricated by the manufacturer, but the tightness is adjustable If the cube doesn't fit your style, just adjust the center screws Challenge their young mind with the 12 sided puzzle cubes, improves fine motor skills and dexterity while keeping them engaged for hours