This was sparked by Youknowit101's recent pick question, then I remembered seeing this in the C.A.T. spot.
It's difficult to not believe that Twilight and Harry Potter both have crazy merchandise devoted to them. I wouldn't be surprised if they're both equal in commercialism.
The first person will name any piece of merchandise, and the next person must find and post a picture of it (Harry Potter or Twilight related, of course), themn name something else for the next person to find.
One thing, we must alternate between the two series (if someone posts something HP, the next person must post something Twilight, then the next HP, the Twilight, and so on)
No taking two turns in a row. Besides that, go as many times as you want.