Work experience is a great starting point, when I was at high school, I did mine in 2005 at Manchester Airport and got a week of going around the aerodrome tower, airfield ops, apron control, baggage management, terminal information desks. Mine was in September so I contacted them as early as possible during this kind of period to get it organised. Mine was done through HR (emailing them) and I presume that's how most will try to organise it unless you find a specific contact. Usually if you search the Airports websites for an ATC contact, that is a good starting point. Good luck to whatever happens, he'll enjoy it!
