We will be in Stockholm for 4 days (our first time) in early June. This will be myself, my husband and three children, ages 9,11,13. Since it is not much time, we can only allot one day for a daytip out of the city. We would like to see as much Swedish history and culture as possible. We enjoy walking around and exploring, seeing forts, castles, sights and museums, going to local markets, eating local food at low-key restaurants, and seeing and interacting with local Swedes. After researching this, I was thinking of Sigtuna, Vaxholm or Uppsala. Any other suggestions? Can anyone recommend how we can set-up one day to do and see as much as possible? We don't mind starting very early in the morning and arriving back in Stockholm late at night.