Just bought my son a Stihl ms170 for a Christmas gift, he is 13 and has wanted one for 3 years now. He cuts a lot with me and uses my ms310 to cut off branchs for the past 3 years. All of that crap about they will get hurt is just that uninformed, witch hunt madness. Any kid, having grown up doing what some consider "high risk" activities under the supervision of an adult will be fine. My kids have ridden 4 wheelers since they were 2 years old with me and now at 9 and 13 they race 90cc quads that will put my Polaris 330 to shame in speed and performance. Never an injury because 1. They have grown up with it 2. They respect the machine.
Ask yourself these simple questions:
1. Are more kids injured each year playing with matches than using a chainsaw?
2. Are more kids injured each year playing with other kids than a chainsaw?
3. Are more kids injured each year playing organized sports than using a chainsaw?
4. Are more kids hurt by their parents (usually their moms I might add) by abuse be it physical, mental then using a chainsaw?
(PS keep in mind that while the domestic violence reports are staggering against men that "beat" women. Look who actually kills their kids the most, wont be men hint, hint)
5. Are more kids injured and killed each year riding in cars than using a chainsaw?
If you go strictly by the odds of injuries, your wife would never let them play with matches, not play with other kids, not let them be in organized sports, certianly never spend any alone time with them, and they could never go anywhere in a car.