My oldest son now 59, was 11 in 1977. Back then you could pay one admittance and stay for the next showing and the next. I dropped him off a few more times so he could sit through it again and again. I know he saw it at least a dozen times, if not more. I took him and his brother to Washington, D.C. in the early 80’s We were there for a week. The only place my oldest son wanted to go to was the Air and Space Museum, so we’d drop him off in the morning, and pick him back up in the afternoon. My youngest son and I did other things while he was roaming the museum.
My Mother used to do that with my brother and I in the 1960’s and we saw everything at least 4 times in one sitting.
Was your oldest son inspired to launch a career in aviation or space? Sounds like he was fascinated by flight.