After dinner, walk around the corner to Kilwin's. Great chocolate and ice cream to die for!
The downtown area of Celebration is a great place for a casual walk after dinner, just to walk off dinner. There are a number of restaurants with bars, if you want to stop off at one and have a beer or cocktail.
Columbia is, by far, our favorite restaurant in the Orlando area, but there are a number of other good restaurants in Celebration as well.