Harry Potter: Is there any websites for trivia concerning Harry Potter books and films?

I want to make up a trivia quiz for my daughters birthday party.It seems like theall the girls are into Harry Potter so Ithought that this might add to some fun.I cant make the questions up myself as I probably would have to ask the questions. The list of questions can be 40.Is there any Harry Potter buff fan out there that could make up questions?10 points to the person who cando this?