Animoby mat is an application that controls small RC vehicle via Bluetooth using a smartphone and an Arduino with bluetooth module.
Arduino UNO loaded with firmware "Animoby UNO" which is in http://www.animobygames.com.br/tutorial/ You can turn your remote control cars into robots controlled by smartphone without having to program and create the interface. The application only needs to be paired by Bluetooth and follow the tutorial found in the Animoby Games site to assemble the Arduino connected to the cart.