Kelly, I have three boys, now 21, 19, and 15.
21 and 15 are avid hunters and die-hard fisherman;
19 will take it or leave it...
We started fishing at age 2or3 with all of them; all three also went through a few years of Scouting (until school and sports got in the way)
They were all exposed to hunting from day one, in that they were always shown the day's "bag" when I got home, whether rabbits, birds, deer, etc, and they "helped" the cleaning and butchering process. As they grew older, they tagged along on short, easy hunts. All three took Hunters Safety and went on their first hunts when they were age 11.
Having said all that, I think you should realize that most young boys go through a "bloodlust" stage where want to kill SOMETHING...that's natural, and should not be repressed. I've got a few spots where they could go out and shoot a mess of cottntails (which were all cleaned and eaten) If you take the time to talk about the animals, where/how they live, etc, the interest can develop if they're inclined....
Great article by Gene Wensel in June/July 2005 TBM
"When Your Kid Doesn't Hunt"....you should read it.
Hunting is natural for boys, and girls if they're exposed and inclined. It's my feeling that if we get too esoteric in trying to raise politically correct hunters, we can stifle the "fun", which is what draws kids in....as long as they're mentored by ethical, law-abiding adults, they'll turn out OK. Try to remember the fun stuff that drew you in years ago, and go from there...
Good luck, and enjoy the ride!