Tons of things to do in the Texas Hill Country:
Johnson City- parks service has small museum with great 30 min films on Lady Bird and President Johnson. Tours of Pres Johnson's boyhood home.
Stonewall- LBJ ranch, Texas White House, his birthplace.
Fredericksburg- Nimitz/Pacific War museum, lots of quaint shops, wildflower farm, herb farm.
Wimberly- quaint shops, sit by the river, Bonsai farm.
Gruene/New Braunfels- Texas' oldest dance hall, shops, tubing (rafting along Guadalupe).
Boerne, Bandera, Castroville- all quaint, picturesque towns.
San Marcos- Outlet malls, Aquarena.
Galveston- historic homes that survived major storm in 1900 and Ike. Moody Gardens.
Corpus Christi- USS Lexington, State Aquarium.
Padre Island- miles and miles of undeveloped beaches, just stay away during college spring breaks.