What to do for a first anniversary in Duluth, MN?

-My boyfriend and I have been dating for a year and both live in Duluth. Our anniversary is Sunday and we will be driving back up from the cities that day, so we can do a whole day outing. We are looking for something fun to do that night. Vista cruise and the train don't do Sunday nights. We are both college student and don't have a ton of money, so something relatively cheap could be appreciated. Thanks!