What's a good sport to match these...
-make new friends -later get to do compitions or go on trips -for those who aren't too flexible -something different -to get more muscles but not harm you because of the growing body.
I take it you are a girl? if so, then water polo or swimming. My sister lost like 50 pounds on swim team, no joke
javalin is good fun or maybe something strange like windsurfing?
Swimming or Tennis, maybe?