The world had been polluted for so many generations that only a few living things are left alive and robots rule the planet.
Robot cities act like their human makers. The few living things left on earth came together and created a circus so to obtain energy from the robot cities as well as cash in on their new found fame.
A large part of the success of the circus is the sideshow acts and Bobo the cyborg clown is a crowd pleaser. In this picture he is handing young robots gifts of all types. He often stops for pictures with families and dances as well as sings. He also has large shows within the main sideshow tent between acts such as Thomas and Tina. Every robot at the circus just loves Bobo the cyborg clown.