 Together, they cause mischief among their family, as well as with the wide array of students at Elmore Junior High, where they attend middle school.The season focuses on the misadventures of Gumball Watterson, a blue 12-year-old cat, along with his adopted brother, Darwin, a goldfish.Together, they cause mischief among their family, as well as with the wide array of students at Elmore Junior High, where they attend middle school.