"Wonderama" aired on its originating station, WNEW-TV in New York City, as well as in five other markets in which Metromedia owned television stations: WTTG in Washington D.C., KMBC-TV in Kansas City, KTTV in Los Angeles, WXIX-TV in Cincinnati, and WTCN-TV in Minneapolis – Saint Paul. The show was three hours long for most of its run on Sunday mornings. The show was created as well as originally hosted by actor-comedian Sandy Becker, who became a New York children's program star in his own right.