Pinewood derby, test run

The big Boy Scout Pinewood Derby was approaching and there was a test run for the boys at school on Wednesday evening. William and daddy worked very hard on his car over Christmas and more during the last several weeks. Amelia was also given the opportunity to make a car to compete in the "sibling race". she and daddy worked together to create her car as well. This is the only time their two cars were in the same race. William's car is on the far left of the track (it is a green dinosaur car) and Amelia's car is on the far right (hers is a blue, white and yellow car). Who was the winner?