 Children from the Corona Theatre School—referred to collectively as the Pink Windmill Kids—were on hand to offer protection and break into one or two song and dance routines per episode.The show featured Rod Hull's chanted catchphrase "There's somebody at the door, oh, there's somebody at the door" every time a visitor rang the doorbell of the Pink Windmill—which 'sneezed' loudly when pressed.The success of Emu's World led to the series being expanded in mid-1984 from 20-minute to 42-minute episodes and re-branded as the "Pink Windmill Show".