Air Cadets, Gliding and Flight Sim. All very good options.
Go to an air show or two every few years.
Do an intro flight every now and then as well to get some more hands on experience.
Also couldn't hurt to look at getting a medical done at some point around 14-15. No point getting all excited about flying and setting your career towards something only to find its not possible do to a medical reason.
(I know thats awfully pessimistic but will stop a lot of cash being wasted on training)