Sign is hidden whenever I slide in the frame pieces, way up a career. Puzzle writers Mine for Japan. Uyematsu design. In 2014, award-winning "world puzzle design competition" Jury Honorable Mention (Honorable mention).　 "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: 4 (out of 6) size: 75 × 119 × 45 (mm) weight: 125 g