Activity based? Does that include art and such? Also, will you have a car?

In Fort Worth, for art museums, you have the Modern, the Kimbell (although it will be between exhibits then, but you can see the permanent for free), and the Amon Carter. In Dallas, you have the Dallas Museum of Art, Nasher Sculpture Center, and the Crow Collection of Asian Art. In Dallas, the 3 all share the same street corner at one point. In Fort Worth, the 3 are all basically in a line.

In Dallas, there are also all the museums at Fair Park. In Fort Worth, the Zoo.

You might also want to check out guidelive.com.

BillJ