I am working on a project on Arduino. There are 3 toys that I want to operate via my ceIphone. I will use an Android phone and Arduino nano's. There are 7 servo motors and PCA9685 cards to run them. I want to get connected to all three toys, select one by one and do two things: a) stream a short MP3 file to Arduino and get played , b) Send signals to run some servo motors that are connected to Arduino. You can use XS-3868 MP3 BT or other devices. Cost of each board shoud be less than $10. I need 3 prototypes, circuit diagram and the android code that should be prepared on Android Studio.