The Spartan Base Kit contains everything needed to build your robot and get it moving in its environment. This kit includes the powerful Core Spartan Controller, two Optical Distance Sensors, one Touch Sensor, one Program Control Button, two motors, two wheels with rubber tread, a caster wheel, rechargeable battery, battery charger, building components, and the tools to put it all together. All the programming tools, specialized Spartan programming libraries, and software needed to create an Arduino development environment can be downloaded free and then you are ready to create and learn using the amazing Modern Robotics Spartan robot.