Independence Hall is more appropriate for older children, ages 12 and up. The red brick building, which was constructed in 1756 as the Pennsylvania State House, is the birthplace of the United States. Here George Washington was appointed commander in chief of the Continental Army. Thomas Jefferson’s Declaration of Independence was signed and the U.S. Constitution was adopted in this building. The tour takes between 60 and 90 minutes. The children on our tour were mostly 12 and up. We didn’t see any other 7-year-olds. The tour can be a bit long-winded for a young child.