That sounds amazing! I would LOVE to go there!I went to a Harry Potter EXHIBITION!
I went with my school. At the entrance our tour guide got us to guess characters, and out of the 60 students people there, I got all three right. I also got to be sorted. I was the third and last person to be sorted and I had noticed that the tour guide asked the students what their favourite house was, and whatever they answered they ended up being in(you could see that she was pressing a button). So, I said "anything but Hufflepuff," and I was put in Ravenclaw(my favourite house). We were then moved to a series of rooms.
It had the actual stuff they used and everything! Costumes, props, everything! They even had a recreation of Hagrid's hut. I was eating every flavour beans and looking at the Yule Ball costumes and I cried. It was just so perfect. It was amazing. We weren't allowed to touch stuff, but I just had to. It was too tempting. I got a Ravenclaw t-shirt and the exhibition book when I was there.