The Thomas Kart is a magazine story.
Stephen and Bridget are staying with their grandfather so they can compete in a go-kart race on Sodor. The Fat Controller builds them a kart and Thomas takes them to the event where the Fat Controller allows him to stay and watch from a nearby siding. As the karts rattle down the steep hill, Stephen and Bridget's overturns and breaks. The two children are not hurt but they do finish last. That night, Duck gives Thomas an idea which he passes on to the Fat Controller. The Fat Controller arranges for another go-kart to be made and the new one looks just like Thomas!