Harry Potter party game ideas?

Well, in honor of the new Harry Potter movie release, (which was awesome, by the way), I decided that i would throw a Harry Potter themed party for me, and a bunch of my equally obsessed HP friends. I already have decorations and everything done, but now...I just need some really cool game ideas! So far, I have Harry Potter Scene It!, Harry Potter jeopardy, and pin the tail on the Hippogriff. Are there any other really fun and originally games that will keep us entertained? They could be trivia related, or anything else. Thanks!