Little Treasures 12 Sided White Cube &ndash; Assorted Color Layer Megaminx Speed Cube Puzzle MIND CHALANGING; 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 3 x 12 rotating Megaminx speed cube is designed for professionals, 12 sided Magic cube is designed with 12 different bright colors, and corner flipping pieces to help solve the puzzle in a jam, now buy one to start the challenging puzzle!