MMRM 3d Maze Magic Cube Labyrinth Rolling Twist Toy Challenging Puzzle Game for Adult Children - Green Useful for practicing brain, memory and improve hands skills Extremely fast with good cornering A test patience, perseverance, and hand-eye coordination This is a continuous through the maze, six sides inside hollow, starting from the first stage, the bead after pass into the second face... If not careful and bead fell into a hole/into the hollow, it can start from the first exit out again Size: 8*8cm (approx)