A gallon of fuel, a cold coke from your ice box, maybe a ham sandwich, pretty much anything so the guy knows that you appreciate what he's doing....a good instructor's reward will be bringing a new guy into the hobby, ya'll could be best friends from this,, I had a bad instructor, he let me know in no uncertain terms that I was cutting into his free time....I quit the hobby for a long time after that, and learned on my own....but I still enjoy the hobby...and I'm sure you will too.....Rog