Ross Perot, T. Boone Pickens, and others from Texas have crafted a nice museum in downtown Dallas. The Perot Museum is five floors of exhibits plus the ground floor and a basement. Each floor has its own themes and it touches on history, geology, geography, animals, and electronics. The whole family spent a day there recently.
Perot Museum website
Attached are a few photos. My favorite were the dinosaur skeletons. My only gripe was the constant pushing of everything being millions of years ago.