I was reading on another thread that your son is headed to the Stanford and Headfirst camps? I bet interest will be generated at those events. My co-worker's nephew was noticed at Headfirst....by a top academic school he had never considered. Graduated this past spring and gainfully employed in NYC. It really doesn't get much better than that!
Try to enjoy this summer. I know I will miss it this time next year.
(also a parent of a 2014)