[ROKR 3D Wooden Puzzle] This wooden music box kit takes 4.5 hours to build up.Wind the cello up,the bow will begin to move and the cello will start to play Chopin's music. [Gift Idea] ROKR 3D puzzles come with beautiful packages and are great for older kids and adults alike.This model cello kit can be a wonderful hoilday and birthday gift for both women and men. [Package Contains] The package contains simple tools,wax and sandpaper.Spare parts are also contained for accidental damage and loss.The whole assembly process doesn't need glue and batteries. [How to Build] We offer a detailed how-to booklet,featuring easy-to-follow,step-by-step tutorials.This wooden puzzle is suitable for adults,older kids and hobbyists of all skill levels. [Quailty] ROKR utilizes industry-leading technology to produce best 3d wooden puzzles.All pieces are laser-cut and the error is less than 1/5000 inch,make sure each part fits tightly. [Service] ROKR offers free replacement of damaged parts.If there is any problem, we will help to