Little Treasures Speed Cube Stickerless Magic Cube Puzzle, Bright Vivid Colors 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 2 by 2 puzzle cubes, improves fine motor skills and dexterity while keeping them engaged for hours 2 X 2 rotating speed cube is designed for starters & professionals