Just like Jessica, we did anything we wanted growing up - swimming lakes and oceans, learning to swim in the local public pool, playing in the dirt/mud, going to water parks, playing sports, etc. We had no restrictions. And I was really healthy (and still am) and my brother died when he was 13. We never even cultured the same bugs and we lived together in the same house (duh). I even kept up our small vegi garden every year as a child. And to this day I still love to vegi garden - I have a very large garden going on right now (we live on almost a half acre). I don't work the soil though - I pay our gardener to till it up for me every year. But only because I just don't want to do the work <img src="i/expressions/face-icon-small-smile.gif" border="0"> DH is the one who cleans out our chicken coop though.
I think I would have been pretty resentful of not being able to do activities I saw others doing if my mom had told me "no you can't do that because you have CF" or "it is bad for your lungs". But that is just my opinion <img src="i/expressions/face-icon-small-smile.gif" border="0">