Hi Sascot,
As Silver mentioned, the gag reflex seems to be the difficult part of inserting the tube. (I told my son to 'visualize' the size of what he was swallowing and how small it actually was compared to a big bite of food.) For the first few days, my son said that inserting the tube felt like when you get water up your nose. But, it only took him a couple of days to get the hang of it and by the second week, he was asking me to 'time' him to see how quickly he could do it! LOL (I think it took him less than 10 seconds.) Our 'NG' nurse said that they had patients much younger who were able to do it but, I think the idea of the NG tube is less 'scary' for older kids.
Coincidentally, a friend of mine also has a daughter with Crohns. She is 10 years old and is just finishing up her 6 weeks of a liquid diet. She also used the NG tube, however, she chose to leave the tube in place. She was not up to inserting and removing the tube each day. But, the tube did not limit her too much during the day - she went out with friends, to parks, etc.
A 'side' benefit is that my friend's daughter needed to do an MRI and drink the nasty liquid that is part of that test. During the last test, she had difficulty drinking it and ended vomiting and having to redo it all. At this last MRI, since she had the NG tube already inserted, they gave her the liquid through the tube and everything went much more smoothly.
I'd like my son to drink coconut water as I have read it is quite healthy and anti-inflammatory but my son does not like the taste at all. I'm actually going to ask the dietitian if I can mix his formula with the coconut water instead of regular water... can get both down in one shot and my son liked that idea!
So the NG tube does have some 'extra' benefits...
Good luck!