The kids' favorite part was the little train that ran along the river. I highly recommend the park for anyone with kids!
Next we went to the Texas State History Museum. Guess why 6 Flags theme park has its name? Because Texas has had 6 flags flying over it: Spain, France, Mexico, Republic of Texas (for 9 years!), USA and Confederate States of America. It was an interesting museum, although I would have learned more if I hadn't been going 60 miles an hour to herd the sheep, er I mean kids.
Of course Austin is the capital of Texas, so we visited the massive capitol building.