As the motor is only to generate vibrations (no shaft) then there is probably no need to run it forward and backward. A simple transistor will do the job tip120 transistor: controlling dc motors and lamps from the arduino | Connect the Dots The motor is only 2.5-3.8 volts so you will need a suitable way to power it. The UNO's 3v3 output is only rated to 50mA so is not suitable