The series concerns the lives of 12-year-old Gumball Watterson, a blue cat, and his goldfish best friend and adoptive brother 10-year-old Darwin, who attend middle school in the fictional city of Elmore, California Gumball Watterson,The Amazing World of Gumball,Cartoon Network,cartoon,adventure,animal cartoon,middle school,friendship,Elmore,kids cartoon,action,adventure,comedy,animated series,TV show,children's entertainment,watch Gumball online