Feature: 1. [Educational and Playful] This DIY bluetooth speaker allows kids to discover how the speaker works while building their own, kids can explore the world of music through hands on activities, fun and meaningful! 2. [Beautiful Sound Quality] With this DIY kit, you can achieve high quality stereo surround, if you like DIY, this music speaker kit is something you can't ignore! 3. [Easy to Assemble] Our kits have clear and easy to understand instructions, and the assembly steps are not difficult, making it easy for you to assemble. 4. [Perfect Holiday Gift] This DIY kit is the perfect gift for kids ages 7 to 14. After safety testing, all wood blocks are made of wood, without chemical treatment, non toxic and non irritating, creating a safe entertainment environment. 5. [Complete Accessories] This kit includes all the things you need to use when splicing, you can immerse yourself in it and enjoy the fun of DIY without worrying about insufficient accessories. Specification: Item Type: DIY Bluetooth Speaker Kit Material: Composite wood Uses: Handcraft, puzzle Teaching Paint Material: Wood without paint Wooden Building Block Type: Building blocks Battery: 1.5V AA battery x 4 (Excluded). Package List: 2 x Building Block1 x Battery Box2 x Speaker3 x Terminal Wire1 x Screw Accessories Package1 x Switch1 x Screwdriver1 x Circuit Board Note: Because the dry battery discharge current is limited, you are advised to set the music volume of mobile phones (other devices) to 60 to 70 percent