We took my sister to the airport and got a hotel room nearby for the night just to make it a fun trip for the girls. We could see all the planes taking off from our room so my sister texted me right before she had to shut off her phone for take off and we watched the planes for about a half hour afterwards. I'm pretty sure she was on one of them.
I hope hey never outgrow their sense of wonder. I haven't. Whenever I drove past an airport I used to pull over and lay on the hood of my car and just watch the planes take off and land.