Why not tell us what you've done so far? What is your topic? Why are you stuck?

What would you like to talk about? It could go from so many different topics, but it has to be one you choose, so possibly get ideas from other kids in your class, see what they're writing about, and so on. *The thesis is actually just really short, so at this moment you don't have to worry too much, but I'd assume you need to write an essay or something later about your thesis.