School trips, service trips, part time jobs (babysitting, dog walking if not qualified for more), college programs, teen tours, drivers education, summer school (my kid will do health next summer to have more room for electives in high school), and have a bunch of weeks to sleep in and play video games, plus family travel.

Summer courses at Brown, Harvard, Stanford, UPenn, Cornell, or Northwestern. Or a boarding school summer semester.

Sometimes really good camps have trips for kids who are older. 6 or 7 week canoing, hiking, sailing trips are common. Also, most camps have a CT program. You should just look on your camp website. Here are some options that are great.

http://www.kieve.org/summer_camp_boys/wilderness_tripping/index.htm

http://www.chewonki.org/trips/default.asp