The format consisted of groups or "gangs" of children responding to letters from viewers who wrote into the show suggesting games, 'makes' and days out.
The show was originally broadcast in the morning during the school summer holidays and once was shown during the weekday evening children's TV slot.
Under Davies's direction, the format of the series shifted from magazine show to drama, with plots frequently centring on harebrained young Welsh presenter Ben Slade and his increasingly elaborate inventions.
The original 1973 theme was "I Say, I Say, I Say", from the De Wolfe Music Library, written by Paul Lewis and credited to The London Studio Group.
[8] This series retained "Kings Road Raspberry Parade" as the closing theme, but by 1981 this had been replaced by a reprise of the opening song.