Final hugs, long goodbyes (goofy faces, see picture on right) - as they both head off to their own worlds of college, apartments, classes, and the like. Independence, freedom, fun and GPA's - that's what I say is important.
Cherish today; even though where you are feels like you'll be there forever, time marches on and waits for no one. Little ones grow up and leave your home- but never your heart.
I'm sure there's an overused cliche or two in there, but sometimes they ring so true I can't say it any better myself.