Plant a tree upon the birth of each grandchild, and then take a picture of it each year to mark your grandchild's birthday.
Devise a secret handshake with your grandchild
Watch a sunset with your grandchild and listen to his or her thoughts
Encourage grandchildren who live far away to write to you by sending them stamped and addressed postcards.
Vicki Lansky's bestselling books include 101 Ways to Make Your Child Feel Special, 101 Ways to Tell Your Child "I Love You," 101 Ways to Be a Special Dad, 101 Ways to Be a Special Mom, and the Practical Parenting Series, which together have sold more than three million copies.