Po is out for a ride on her Scooter. The Teletubbies watch James and Matthew help their uncle Mark milk the cows . It's Time for Tubby Custard, but the Tubby Custard Machine won't work, so the Teletubbies decide to sing a special Tubby Custard song, the Tubby Custard Machine makes some Tubby Custard Music, the Teletubbies try to make Tubby Custard and the Tubby Custard Machine is working Again.