I don't know if it's feasible for you, but if you can, try to take your kid to see a live rocket launch. The TV is grossly unable to display how awesome these things are in person.
It is one of the things I regret not ever getting to see a shuttle launch. The closest I ever got was when I flew over Florida while a shuttle was on the pad.
And a landing! S Padre is great for kids and rockets.
For the more adventurous and/or bilingual the beaches on the Mexican side seem to have awesome views too.
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The scale really is unfathomable for the human brain.