We are flying with two children ages 9 and 7 who have never flown before. We have no idea how their bodies will handle it i.e. ears, headache. What does everyone do to help prevent problems that they might have. The one and only time I flew (many years ago) I got a migraine which was probably more from stress. Recently, two different times my adult daughter flew she got a headache in the same spot. One was bearable and the other was severe.Any suggestions?