the show's website. Also, more recently, two new Zook-Kit features have been released that allow users to simulate the TV contests and then replay their Zooks' performances from multiple angles. Gameware's Creature Labs team uses artificial life programming techniques to provide the Zooks' autonomous movement and behavior and integrates this with the BBC's virtual studio system to enable real-time visualizations in a studio setting. The toolkit, the Bamzooki Zook Kit, enables users to build virtual creatures, called Zooks, and test them in a real-time, physically simulated environment. Kids used this software to build Zooks, which were submitted to the BBC. Teams were selected and invited into the studio to enter their Zooks in various contests. The new series "Bamzooki: Street Rules," which aired in November 2009, features fully interactive contests, where the participants direct their Zooks by shouting instructions, as well as contests set on the streets and rooftops. 36 teams were selected to take part in the championships, which included nine heats, a semi-final, and a final. The software, as well as the manual, were freely available from the BBC website.Although designed to be easy enough to be used by children, it is highly flexible and versatile. Zooks are constructed from the ground up using basic component parts that the user shapes and sticks together. Users are not restricted to particular body designs or topologies, although the control system uses a standard Braitenberg architecture. The BBC's Virtual Studio technology was used to enable real-time composition of the 3D-rendered graphics with live camera feeds. Each studio camera has a dedicated render PC to render the virtual scene from that camera's perspective. To know what a studio camera's perspective is, each camera is fitted with a second "Free-D" camera that points towards the ceiling. On the ceiling are reflective, circular bar codes. The 3-D camera data is fed to a computer system that identifies the targets on the ceiling and calculates the camera's position and orientation 50 times a second. Series 4 adopted Vinten tracking peds instead of FREE-D as an alternative approach. The contest runs in real time on a networked PC. All the clients receive contest scene information and render their scenes from their studio camera's point of view. A bank of color boxes then composites the virtual and the live feed together to provide a real-time composite. This video stream can be sent to the studio camera monitors