D.F.
Well, we live in east Dallas, so some of this might not be as easy for you to do. I'm planning on weekly activities that we repeat. As an example:
Mondays, ride the DART train to the Dallas Zoo (discounted admission on M & T when you ride DART)
Tuesdays, go to the free family movie festival at Galaxy Stadium (there are other locations for this as well)
Wednesdays, go to Farmers Market
Thursdays, playdate at home & invite a friend over & make sidewalk chalk/sidewalk paint drawings on the driveway or fill up the splash pool
Fridays, go to the splash park; if it's raining, go to the public library (sometimes they have free story times for kids, too)
Hope this helps!