Piece of the puzzle is a simple process can be solved while watching movements mysterious and interesting. This puzzle is so much magical fun.　 "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: 2 (out of 6) size: 75 × 119 × 45 (mm) weight: 100 g