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 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 . 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 which you cannot miss! Holiday Gift: Perform rewarding science experiments with your family or friends. 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- 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: 24 x wood board 8 x speaker(Random in black or silver, don't accept the specified color) ) 4 x bluetooth module 4 x battery box 4 x switch 4 x terminal line combination 4 x short screw set 4 x long screw set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.