Little Treasures Cube 3 x 3 x 3 Puzzle Star Shaped Speed Stickerless Magic Cube, Brain Teaser, Blue The brain teaser puzzle will change shape as it is twisted, due to the way it is cut Improves fine motor skills and dexterity while keeping them engaged for hours 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