Of the KANAWA-shaped arm to each other, remove it, cannot be undone. The masterpiece is called "one of the most difficult ever". The design of Eldon Vaughn had electrician for many years in the United States.　 "The cause" and is? "Has caused" and the adult inspiration and logic to solve the puzzle. The Mission's "off." And "back to you". Simple, but profound. And take full advantage of the head and hands, I try to challenge you. Product specifications: ages: 6-year-old-difficulty: 6 (out of 6) size: 75 × 119 × 45 (mm) weight: 134 g