I was in the same predicament as you, albeit in Australia, when I was a youngin. I wanted to start flying SO bad but had to wait as starting too early would just be a waste of money, considering there are the issues of minimum ages to gain licences.
What I did, was go and join the Australian Air Force Cadets and that sufficed my urge to start flying until the age came about. Now, last year I went on a trip called IACE (Internatinal Air Cadet Exchange) during which I went to England and Wales, visiting numerous tourist hotspots as well as English and Welsh air cadet squadrons.
You may be thinking, well, I don't like the military, I don't want to be in the actual military later in life etc... But the fact is, the Air Cadets is a fun and structured way of learning about all things to do with civil and military aviation, with no commitments to any of the armed forces upon completion.
During my 6 years service I had the privilege of getting flights on numerous military aircraft, I spent all in all about 2 months (spread over the 6 years) on various air force bases within Australia taking part in numerous activities, one of which gained me a certificate in frontline management, and a certificate in machining and drilling just by completing the course! I even went on an amazing international trip!
While I was in Wales, whilst staying at RAF Valley (Prince William's posted RAF Base) I was fortunate enough to get a trip to the Central Gliding School at RAF Syerston, and was taken up by current RAF fighter pilots for some amazing glider aerobatics in both powered and traditional gliders. The Central Gliding School has numerous aircraft and instructors, and I know for a fact that you can go solo and all that jazz through cadets itself, at a very subsidized rate (as much as 50% off the hourly rate).
This website will tell you pretty much everything you need to know:
Air Cadets - Home
Even, after looking at the website, you're still unsure, just go and visit your local squadron and ask the Commanding Officer to give you a little tour, I'm more than sure they would oblige.
The air cadets is a fantastic way of sufficing your aviation urges whilst doing something fun, and useful for later in life. And as an added bonus, a long career in the cadets looks amazing on the resume.
I hope this helps! =)