The Train Trolley is a magazine story.
One day, the Fat Controller goes shopping at the local supermarket. People are filling up their trolleys with food and the children are trying to push the large trolleys. The Fat Controller gets an idea and goes to see the manager. He suggests that the shop get some small trolleys for the children to push up and down the aisles. The manager agrees as Gordon steams past. The children call out to Gordon and the shop manager says that the children love to see the trains go by.
Some weeks later, when the Fat Controller visits the supermarket again, he sees children pushing small trolleys with engine funnels and faces on them. The manager admits that the train trolleys are ideal for the little children.