A fifteen-year-old girl was awarded first prize a brand-new kite.

What do you think the subject is?

girl

Correct

The students in my class made custard.

To find the answer to this question, we need to understand the question itself. The question mentions a fifteen-year-old girl being awarded first prize, which is a new kite. This suggests that there might be a story or an event where this occurred. In order to get more information about the story or event, we would need additional details. Without any further context, it is difficult to provide a specific answer.

However, if you have additional information or details about the event or story, please provide them, and I will do my best to help you!