Trisha and David make a big over-the-shoulder box car and turn it into an ambulance for Humpty. Other vehicles are made from recycled containers, a milk truck from milk cartons, a fire engine, a street sweeper and a garbage truck. The fire engine ladder is made from a coat hanger and hair bands. The presenters play with the vehicles to create traffic. Through the windows are city sounds. The animations 'Garbage Man' and 'I'm Walking in the City' are shown. The story is 'I Went Walking' by Sue Machin.