Bon Voyage!
Don't spend too much time in the world showcase! LOL I am 17 and to be quite honest, I have never really enjoyed that part so much. I did like seeing some of the authentic international things, but besides that, it was boring lol. As it is, I am not a big EPCOT fan. I like things that are fast and exciting lol.
I would say, go on Soarin' (was there a question? lol) but make sure to get a FP. (75 minutes in a line is a looonnnngggg wait lol)
Also, try Mission Space if you don't get motion sick and can take the thought that you are actually spinning VERY fast! lol Oh and if you are not afraid of dark, tight spaces lol. (The ride was awesome, but I got a little sick after my father reminded me that we were going around and around lol)
Test Track is a must! (I still swear they made it go faster! lol) *hint* use the singles line. I went with three other people (four including myself) and despite the fact we did not ride all in the same car, we rode two and two. The line whipped right through and we passed the regular stand by line. Pretty awesome.
Do NOT go on the Universe of Energy. I was so close to falling asleep on that ride last time I rode. Also, Maelstrom was kind of boring for me. (In Norway)
J'espere le voyage est tres amusant! Il fait chaud, alors amene beaucoup de l'eau!