DEAR ABBY: It seems the children I raised and taught to write thank-you notes somehow failed to teach their children the importance of being grateful receivers. My two teenage grandchildren have never thanked me for a birthday or Christmas gift. I gave one of them a set of personalized notepaper, but it didn’t spur any action. Birthdays have come and gone this year, but Christmas is on the way. I’m wondering what I can do to reach these young people in a meaningful manner. I’m older now and don’t know how much longer I’ll be around to influence them. I recall you ...