Transport into magical mystery with the Diy 3D Music Box Puzzle Magic Cello 199pcs. This wooden puzzle is an intricately, whimsical cello, plays by itself! This mechanical music box works with a complex moving gears structure, so no batteries are required! Once built, this magical cello puzzle has a moving bow and plays itself to the music tune of Nocturne, Op.9, No.2 in E-flat. Share your passion for music and puzzle-solving by giving this 3D wooden puzzle music box!