I'm thirteen years old, almost 14. Here's my view on it.
Your son will most likely be going to the doctors every three months to do a pulmonary function test (pft). These tests don't hurt, but they are extremely tiring for cf patients because it requires taking very big breaths and us cf kids don't normally take deep breaths because its hard for us.
He will also wonder things like "why me?" And "life is too hard to deal with.", so make sure you let him know he can talk to you whenever he needs to.
For the first little while, expect to go to the hospital for about two weeks at a time quite often. This is because he is young and doesn't know how to keep himself healthy on his own. Just be sure to teach him that if he takes good care of himself, he doesn't have to go in as often.
He will have to take many pills each day, so teaching him how to swallow them will make it easier for you and him.
Every cf child has 2 "mutations", or characteristics, that define how they will be treated in life. Almost every single child has different mutations that are deadly when they come in contact with other cf mutations (so keep your son away from other children with cf).
You have to make sure he eats A LOT and takes pancreatic enzymes with everything because cf pancreas' don't work the way they should and you don't digest properly without the enzymes. I am about 5' 1". I would be taller, around 5' 4", but I don't take my enzymes like I should. I'm supposed to weigh about 100 lbs, and I barely keep 87 lbs on me. The enzymes also help you from getting constipation. The give you this awful IV fluid called "golytely", which makes you poop. Well, let me just tell you, that is a misnomer.
I would love to give you a kids point of view whenever you need it, so email me!
megan.ashley.scott@gmail.com