Ok, motorcycle, mini-bike, computer camp, enrollment in the BSA, REAL shooting lessons at the local range, Martial arts class, etc.
Motorcycle!?! I can't think of anything more violent. Motorcycle riding is riskier than cigarette smoking. You'd be better off giving your child a carton of Marlboros.
Particularly the versions with the automatic weapons or antitank rocket launchers fitted.
Some of those off-road ATV riders can be a rough sort, too.