+1 for individual sports. Never seems to be an option that is considered though. Sending your kid off to soccer camp is much easier. Plus individual sports tend towards expensive/elitist (track being the exception): horse riding, golf, rowing etc. Maybe you can but I've never knew of such a thing as a summer track camp. People tend to send kids away for general camps, or hockey, soccer, football, probably in that order of popularity with hockey potentially higher than general (I'm in Canada eh?).
Mah, I liked to read. By the time I was in 6-7th grade I was reading stuff my parents didn't understand, by 9th often stuff I couldn't find a teacher that understood it. My science class was basically my teacher pointing me to the library and telling me to go nuts (I have a theoretical physics bent), or even funnier giving me the kit to play with at home "here go make yourself some hydrogen".
I was also active though, I liked baseball but didn't like that it took up every free moment of the summer. I'd like to be able to play soccer one day then basketball the next. Then bike in the woods and throw dirt clumps at friends etc. Didn't like the structure of being on a league and forced to play 3-4 days a week (or what would have been the alternative a camp where you play different sports but someone tells you what and when).