The answer to that is: not much. I could write a book on what makes a folk tale or a fairy tale, but I won't do that (lucky you!). Some experts say that fairy tales are simply a sub-genre of folk tales and are different only in that they involve magic and/or fantastic creatures. That's a bit of an oversimplification, but without more instruction about the structure and elements of each story, it will do for now. There is more to know about the structure of these stories, but if I teach you everything now, you'll have nothing left to learn in high school, and that would be a bad thing!