Hey
The best thing he can do is join the Air cadets, and avoid the CCF (Combined cadet force) which is run through schools.
Im a memeber of the Air cadets and it has given me the chance to do all sorts ive done everything from hiking to jumping out of planes!!!!
Its great free flying and giliding. Also theres far more and it teachers you skills you will use throguht ur life such as leadership and instructor techniques.
Also it looks good on CVs with some qualifications such as DofE and Millenium Volenters.
Also you can gain a Btec in avitaion studies, just through being a cadet.
I also agree with Bealzebub how you shoud reward your son with flying. My Mum and dad did that, i then got a job at my flying school which pays me in flying and now i have nearly completed my PPL and im also around aircarft learning invalibule information.
Best of Luck
ADWJENK
www.aircadets.org