Last weekend we went to Amsterdam for the "Pixar, 25 years of animation" exposition. It shows, through numerous sketches, the story of Pixar since its beginnings. We enjoyed the exposition, but to be honest we thought it was a bit pricey, at EUR 19 per person.
I think hardcore fans would be pleased, as you see tons and tons of drawings. I found interesting that you could see different versions of a character... admiring the behind-the-scenes process that goes on to choose the final drafts. There are also models, clay figures, and my favorite a Zoetrope that brought the characters of Toy Story to life in 3 dimensions.
You can visit the exposition at the Amsterdam EXPO buiding (Gustav Mahlerlaan 24
1082 MC in Amsterdam), near the Amsterdam Zuid train station until October 27, 2013.