HelloCube ShengShou Snack Cube Ruler Twist Puzzle Blue Chinldren's Gift HelloCube ShengShou Snack Cube Ruler Twist Puzzle Blue For kids, it can develop their brain and logic thinking ability For young, the puzzle cube regard as hobby, Participate in the competition and enrich your life. For middle-aged and aged people, the puzzle cube prevent diseases in brain and improve the flexibility of the hand.