Space center Houston discount/promo code?

Greetings, Houstonians! My family and I are planning to visit Houston for a week and one of the attractions on our lists is The space center. I searched and found 2 discount codes for Space center Houston but they've expired as the posts are 2 and 5 years old…

Can someone please help us with space center discount codes for 2002? That also helps us save some extra bucks and use that to enjoy more places in Houston 🙂