As part of a six-figure campaign, cinemas in the station areas will run 60-second spots from Friday and a three-minute version will be spread via viral emails to drive people to Xfm's .
Mother has built on its previous poster campaign, which showed babies dressed as Xfm artists such as Pete Doherty and The Magic Numbers, with the documentary-style film, which features three- to eight-year-olds working at Xfm and at the live events it puts on.
This footage is combined with to-camera interviews with a number of musicians and Xfm DJs talking seriously about the "Xfm kids" and how valuable they are to the station.
They include bands Hard-Fi and Embrace, Xfm London drivetime DJ Richard Bacon and Elbow front man and Xfm Manchester DJ Guy Garvey.
Richard Mintz, marketing director at Xfm, said: "Xfm champions new music, but it's our irreverent and humorous delivery that makes us stand out from the crowd."
Mark Waites, creative director at Mother, said: "The Xfm posters featuring babies as famous rock stars had gone over quite well so it seemed like a good idea to capitalise on the parallel drawn between new music and youth. Another Xfm standout is that they play a lot of guitar-based music, so children as roadies seemed like a natural fit."
The push comes in the same week that the station recruited a new programme director to replace five-year veteran Andy Ashton, who left last week. Adam Uytman has joined from Emap station Kerrang! West Midlands.
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