Little Treasures Yellow Puzzle Star Shaped Speed Cube 3x3x3 Stickerless Magic Cube Brain Teaser The Brain Teaser puzzle will change shape as it is twisted, due to the way it is cut - adding an extra level of challenge and difficulty Challenge their young mind with the star shaped puzzle Cube, improves fine motor skills and dexterity while keeping them engaged for hours 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. Made from ABS plastic  for kids 5 years and older.