It is a surprising thought that the Baby Boom of the nineteen forties, now stretching the colleges in the sixties, will confront society one last time in the nineteen nineties as the great Grandparents Explosion (it may even reappear still later as the great Great Grandparent Boom of the 2020's, but perhaps by then the distribution curve will have spread to imperceptibility). Whether or not grandparents become more of a problem than they (we) are now, few of them are likely to come to the pediatrician for advice on how to behave.