Hi Edan,
This is such a tough question and there are opinions about this across the board. But I can give you my ideas about what has worked for us and what I know about healthy child development.
So, first of all, as much as we try, we can't avoid our child getting pseud. My son got it at age 2, even though we were quite paranoid about bugs early on with him as many "newly diagnosed parents" understandably are. And my daughter, now age 9, has never had a culture with it yet and we were alot more relaxed with her. Go figure. Pseud is everywhere. That being said, we can certainly be prudent about what we allow our children to do- just not paranoid!
So, for us, we avoid hot tubs and indoor pools. Does this mean we never go in them? No. If we are with special people at a special event, we go with the flow and allow the kids to swim with the others. This happens maybe 2-3x year.
Water fountains? We do our best to not need them but if we do, we use them. Soda fountains are probably just as bad but we still buy pop at McDonald's every now and then (we don't drink alot of pop for other reasons like the sugar and diabetes risks).
Bubble machines I've never thought of but I would probably let my kids play with bubbles- I'm sure we came in contact with them at times when our kids were little, I just don't remember. The soap might actually help to keep things clean (I'm guessing here) and I'd be sure to wash hands afterwards. I suspect that the nasty taste of soap would keep most little ones from putting hands in mouths.
So, my motto has always been: prudent, not paranoid. I take measured risks weighing the following:
1. Will my kid feel left out if he doesn't do it?
2. Will this make my kid feel different?
3. Will this make my kid resent CF (and me)if I say No?
4. Will this action that I am taking likely make my kid feel like a victim of CF?
5. Is this something that my doctors have said "don't do" or am I just being worried and scared?
6. Is this something my kid is likely to do anyway if I am not around?
We want to raise children who enjoy life, see themselves as a person and not a disease, are empowered to be all they can be, and who take charge of their lives and fight CF instead of simply sitting on the sidelines of life waiting to die.
Over-protection creates a victim mentality as well as is likely to result in either rebellion or depression when they are teens. The book and movie "The Secret Garden" is a good example of what can happen with over-protection and medical issues and is not far off the mark of reality.
If you want more information about the dangers of over-protection and how to prevent the problems associated with it, we have several articles on our website at www.ParentingChildrenWithHealthIssues.com.
Of course the BEST things you can do is good handwashing, often. Avoid obviously sick people whenever possible without being obnoxious. Set limits around sick people coming into your home. Teach your child early on about good health habits and why it's so important; good CF care. Help your children learn about choices and consequences at a young age (even 12 month old babies can learn "If you pull mommy's hair, then mommy will put you down.") Have fun, enjoy life, and be prudent- but not paranoid.
I hope this helps give you some ideas. They are simply my humble opinions...
Hugs and hope,
Lisa