Winky Dink has been hailed as the worlds first Interactive Television Series. For fifty cents one could purchase kit that came with a large Vynel plastic sheet, and crayons. At key points in the show Winky Dink would prompt the viewers to complete a connect the dot puzzle that would form something needed for him to continue in the story. For example, a bridge. Winky Dink also featured a decoding system.
Concern rose over X-Ray exposure (a problem found in early Colorized Tubular TV systems), a concern coupled with complaints that children without the kit where actually drawing on the TV screens, got the show cancelled. It was latter revived in 1959 under Syndication.
CBS (1953 to 1957)