This robot adds on to the Castor Bot design to add the various sensor types to it. You can add any or all of the sensors shown here (just leave out any that you don't need). The color sensor is positioned pointing down at the ground where it can sense lines or colored areas on the ground, and both touch bumpers are used to make a front bumper that can detect bumps on the left side, right side or center/both.

Eight sample programs are available below to show some of the things you can do with these sensors. The programs also show some general coding techniques, from simple to advanced.