At the time, there was a UX internship group with around 30 interns. Each intern was matched with a manager in a wide variety of teams, It is pretty variable what you work on, what you are expected to do, the autonomy you hold, etc... on what manager and team you get. But most likely you will be doing a long term creative project that is improving something or coming up with future viable ideas. It could working on a new search experience or kindle textbooks or anything else. You will probably be using Adobe photoshop and illustrator a lot.