We love Fossil Rim. It is an all-day event so you might even want to get a hotel. Don't forget to check out the Creation Evidences Museum
http://75.125.60.6/~creatio1/index.php?option=com_content...
Just past the entrance to Dinosaur Valley there is a farmer that for a small fee will let you cross his property to go to the Paluxy River bed to see dino tracks with human footprints in them along the same strata of rock. Really cool stuff!
There is also Comanche Peak Nuclear Power plant you can visit not far from there with a really nice visitor center. Below is from their website.
The Visitors Center
Our visitors center offers an overview of the nuclear plant. See it all in a video that shows the inside of the plant and how it works followed by a Q & A session led by your Visitors Center escort. Experience interactive exhibits and graphic displays.
The Visitors Center is open by appointment only. You may contact us at ###-###-#### or e-mail us at ____@____.com.