you can pay anything between $10 and $200
Although 10$ is pretty cheap, it is not free, maybe you could say "almost free" (I know, I am being picky).
well you
can , doesn't mean you must ;p - aka if you can afford to help in the funding, it would be great, otherwise it is for free.
mir, is there any liniancy towards age restrictions (can someone whose 13 or 14 apply)?
yes - they can apply :)
arithma : i missed to read this xkcd - nice. here is another ;p