I didn't bring anything. All my awards/accomplishments were listed before hand in my application. During my interview, I mentioned my accomplishments when I had to, but I didn't bring anything mainly because my credentials are right in front of them. Also, I didn't want my answers to go off topic, or way off base, or come off cocky. Like the above mentioned, most of the questions are social based or personality questions and ethical questions. They never asked me anything transcript based, but since most questions are open ended, you can mention them if you like.
You will definitely have the opportunity to discuss your merits/accomplishments during your interviews, so presenting them is not necessary. If you do want to present them, be sure to practice how you plan on doing so before hand. You don't want to come off the wrong way.