Discover how speakers work: This DIY Bluetooth Speaker allows you to discover how speakers work while building your own. It is easy to assemble and enables kids to explore the world of sound, music through hands-on activities. Fun and entertaining,It will never go out of style! This is a beautiful speaker that is fun to build and nice to look at when finished, it is not only a practicing kit, but also a decorative gift for you. Build your own bluetooth speaker by yourself, a cool project and challenging enough to be fun. DIY Bluetooth Speaker Kit to Build: This product has the latest version, and you can achieve high-quality stereo surround.If you like to DIY,this music speaker kit was the one which you cannot miss! Perfect Holiday Gift: Perform rewarding science experiments with your family or friends. Perfect Gift for kids ages 7 8 9 10 11 12 13 14 teens.Safety tested, all wooden blocks are made of real wood without chemical finishing. Non-toxic and non-irritating it creates a safe entertainment environment. Product is unassembled(Powered by four AA batteries)(Battery does not include) Colour:Photo Color Material:Wood Package Contents: 30 x wood board 10 x speaker(Random in black or silver, don't accept the specified color) ) 5 x bluetooth module 5 x battery box 5 x switch 5 x terminal line combination 5 x short screw set 5 x long screw set