Summary: During a trip to Washington DC, children learn that freedom has a cost and that cost can be very high. Learn how to instill a lesson that helps your child to understand the cost of freedom and the history of the United States. On our quick one-day trip, we were able to see as much as we did thanks to the Old Town Trolley (http://www.trolleytours.com/washington-dc/) company. Their trolleys took us directly to the places we wanted to visit on our one day blitz of the nation's capital.