Every parent has been through it. As your child gets bigger and
learns to talk, it becomes time for her or him to learn to say "thank
you." So Mom and Dad gently urge their toddler to thank Grandma for the
birthday present, and everybody gets a kick out of her young tongue
stumbling over the words. As the child grows older, the gentle urging
becomes pestering, as her parents hope that at the birthday party, she
won't simply grab the present from her friend at the door and tear off
the wrapping paper. "Say 'thank you,' " you nag; and she mumbles a