Annette Mills, older sister of actor Sir John Mills, was a promising dancer whose career was ended by a broken leg. Following a further injury in a serious car accident during the War, she joined the BBC in 1946, telling stories and singing songs for children.

Noticing one day how the top of her grand piano resembled a stage, she hit upon the idea of populating it with the characters in her stories.

With producer Andrew Miller Jones, Mills approached top theatre puppeteer Jan Bussell and his wife Ann Hogarth. Among Bussell's huge store of puppets, Mills found an underused clown and circus mule (made by Fred Tickner).

Naming them Muffin the Mule and Crumpet the Clown, she used them in her For the Children broadcasts from Alexandra Palace.

Mills and Hogarth felt non-speaking animal characters better stimulated young imaginations, and Crumpet was soon dropped. Alongside other Bussell puppets, including Poppy the Parrot and Sally the Seal, Mills and associate Stanley Maille added new ones like Peregrine the Penguin and Katy the Kangaroo. Also popular were the kittens Prudence and Primrose.

The stories were plotted by Hogarth, and fleshed out with songs and dialogue by Mills. The team broadcast live until 1952, when they began filming stories for repeated broadcast, renamed Muffin the Mule, and usually screened on Sunday teatimes.

Each fifteen-minute episode opened with Mills seated at the piano, singing the theme song - "Here comes Muffin, Muffin the Mule/ Dear old Muffin, playing the fool...", while Muffin clattered loudly on the piano top (operated from behind a set wall by Hogarth).

There followed a loose story, populated by the many puppets at Hogarth's disposal. Mills rarely addressed the children directly, beyond a cheery "goodbye 'til next time." Her slightly shrill upper-class tones are perhaps the most poignant reminder of early television.