We spent this past week in Phoenix (a great trip that I will write about later). We stayed fairly close to the airport and I discovered that apparently my children, my son especially, love airplanes. Each time one would fly overhead he'd yell and laugh and jump up and down. It was cheap and easy entertainment.
Back in Tucson, planes seldom fly over the area in which we live. I think on the days the kids are driving me nuts I might send them to the backyard and tell them to watch for planes. It might kill an hour or four.