Secondly, when people miss it, many times, life is not full enough. When they have leisure time, they will miss their families and think about other time. Therefore, parents can encourage their children to make more friends, go out for a walk, enjoy the beauty of college, eat delicious food from college or concentrate on their studies. Make yourself more substantial, and you won't be so homesick.
The most important thing is the communication between parents and children, so parents should not blame their children for homesickness, and it would be better to explain more.