I made this kit to sell in my shop, the app is made for Edwin Salas Art, but the connection with Bluetooth and the part of the control with App inventor are of MERT ARDUINO & DIY.
 
Download the App Android at Google Play Store
 
Include:
6 wood pieces, Nano eleego, bluetooth chip, 5v charge, servo motor.
 
When you buy the kit, I will made and near one week to arrive at your hands.