Well, I was informed that a single engine costs up to $6000
So making "dimples" in the ground might not be such a hot idea.
I guess you could build a scale model of a A-10 Warthog and put a .22 caliber gun in it to represent the
30 mm canon it really has. Might be a little dangerous, but then again no one gets out of life alive

(If a .22 is to much, you could always use a BB like they do in model battleship battles)
And you can get a small camera (in color) that will send its picture to a small receiver you just hook up to your TV. My brother in law has one and it is pretty cool. Don't know the range though.
(Pic stolen from:
http://www.limalima.com/art/A-10%20Warthog.jpg )