Huntsville, Alabam is known as "rocket city" and there is a good reason for that. It's the home to many aerospace facilities and home of the U.S. Space & Rocket Center.
It has great exibits and the rockets are impressive in size.
My kids young and old love to spend the day there and explore and learn more about rockets.
The space suits are a fun photo spot and there is a gift shop with some really cool educational gifts.
If you're local the membership is the way to go, then you can have year around access and come anytime. Considering that they update their exibits, it's the way to go!
Check out the Space & Rocket Center