I think that one of the best project ideas would be to trace the influence of Dracula on pop culture. For example, the book and character have influenced many books and movies on both sides of the vampires are good or bad equation.
You can check the following link for ideas from eNotes:
Also, the concept of verisimilitude, or the use of supposedly real items for promoting the narrative storyline of the work (diaries, newspaper articles, telegrams, letters, etc.), might make an interesting project. Maybe you could make your own items, like torn out, old-fashioned-looking diary entries, newspaper articles, letters, obituaries, etc., from the book to display, as well as write a report examining the use of this literary technique in Dracula and other works of literature.