Hi MA & Seaglass,
You know, I've never been to Billy Bob's....... Will have to go someday, maybe.
If you are still in Ft Worth when you read this - the biggies (for me at least) are the FW Zoo (world class), the Vintage Flying Museum at Meacham Airport, all the museums at the Cultural Center - Kimbell, Amon Carter and the new Modern Art and the Stockyards.
Other than the above, I'm sure you've heard of Tandy Leather Co. The original store was down in Old Town very close to the Texas & Pacific RR Depot (It's not advertised)
Quick story about the T&P depot - When a very young and learning child, my parents and I came to the station - I begged a nickel for a drink - got the nickel and went directly to the drink stand where a man about 12 feet tall (so it seemed to me) asked what I wanted. I asked what kind of cokes he had - he looked down at me and said "Kid, I only have one kind of coke!" I quickly realized the importance of brand names.
I don't know which way you're going from FW - but Carlsbad Caverns on the NM/TX border is worth a stop. If you travel I-20 from FW to Pecos, TX that is a good place to snap a photo as you pass - it's the site of the world's first rodeo.
http://www.lone-star.net/mall/txtrails/pecos.htm (a bit of trivia for ya) Also a good point to turn to Carlsbad Caverns.
By the way, tell Seaglass I've lived in: Aledo, Weatherford, Gordon, Ranger, Eastland, Cisco, Baird, Clyde, Abilene, Merkel, Trent, Sweetwater, Roscoe, Westbrook, Big Spring, Stanton, Midland, Odessa, Monahans, Pyote, Barstow, Pecos, Toyah, Kent, Van Horn. My Dad worked for the Texas & Pacific RR and we (the whole family) lived in an "outfit car" that rolled on the rails with the other cars - boxcars, gondolas, flatcars, etc. It was really fun for me as a kid - but I bet my Mom was watchful. All my school buddies wanted to come to my house to play. This was back in the days of Steam Engines - those big babys were alive with steam coursing through their veins. It was exciting.