Sarah is a small, quick, and simple Arduino robot for beginner makers. She uses a differential drive to maneuver. She also uses the Dual TB6612FNG, capable of drawing 1 amp, motor driver to control the motion of the two wheels. I wanted to make a cheap and simple robot for those makers whoa re just getting into the hobby, so as to make something fun to play with without breaking the bank or pouring countless hours into.”

Link