A new autonomous mobile robot for research, education and Arts is presented. The robot features a rich variety of sensors and an extendable processing unit while still maintaining very small size (approx. 51 mm in diameter). The robot can be used in combination with a very versatile arena for robot experiments that allows to setup and execute experiments in an easy and automated fashion, which also includes automatic recharging of the robot. We will provide an overview of the basic modular hardware design of the robot including a detailed description of the cpu, power management, bus system, actuators and sensors. A special section will be dedicated to a detailed description of the communication capabilities of the robot. Furthermore we will present the software architecture which provides high-level access to the robots hardware.