Have you encountered Duolingo? Very cool site, independently verified to be as good as a college class, crowdsources things like translating Wikipedia into different languages (so that the target language gets access to a body of originally-English material and the translators get practical work translating real documents), generally quite friendly. I played with it for a while but never stuck with it, mostly because the languages I really want to learn aren't on it yet. (Russian is the big one. I'd love to be able to speak Russian. I'd also love to be able to speak Yoruba, but I am under no illusions that Duolingo will have that anytime in the plannable future.)

And oh man, yeah. There's actually a school not too far from me that teaches kids how to freerun, and I'm more than a little jealous. Then, I managed to drift out of every structured physical activity I ever tried, from fencing to Judo to cross country, so even if I had been enrolled in it as a kid, I'd probably still have drifted away and gone back to writing things.

(Flight would be pretty cool! But I enjoy the mental image of turning into something big, armored, and stompy (preferably). Possibly because I spent a lot of my childhood playing monster.)