Zumo is our first line following robot.   I plan to start out using Pololu example code and end up with a loop proof line follower.   Then build a micromouse type from scratch using Pololu gearmotors w encoders, Arduino Uno, Line Follow IR array.    

Zumo right after assembly.

Like a puppy, on it's back wanting a belly rub.   You can see the sensor array.

From the rear.

Zumo likes this line maze.   The first maze I made too small, Zumo would get confused.

Ready to "Charge".