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 KitMaterial: Composite woodUses: Handcraft, puzzle TeachingPaint Material: Wood without paintWooden Building Block Type: Building blocksBattery: 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 BoardNote: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