The short-running series features microscopic characters who live in the fictitious land of "Do As You're Told", a strange and colourful place (that was not completely separate from the human world, as one episode features a busy road and another features children playing) whose inhabitants are named after orders directed at children by their parents. Unlike "The Trap Door", which ran for 40 episodes over two series, only a single series of thirteen episodes was produced. Each episode is named after a character that features in the episode (however, the character "Not Now" did not have an episode named after him because he was the pet of the series' antagonist "I Said No").