We are going to a wedding in September in the Harrisburg area. We were thinking of leaving a day early to go the Baltimore Aquarium, but the more I think about D.C. is only about 2 hours more. Which would you do? My husband and I have done both, but our children haven't done either. The kids will be 9,7,2 at time of travel. We will only have one day to do this. TIA.