In families children tend to take on stock roles, as if there were hats hung up in some secret place, visible only to the children. Each succeeding child selects a hat and takes on that role: the good child, the black sheep, the clown, and so forth.

In a study that I just did, I found that it was older children, not younger children, who felt that they didn't have enough time with their parents.

The colicky baby who becomes calm, the quiet infant who throws temper tantrums at two, the wild child at four who becomes seriousand studious at six all seem to surprise their parents. It is difficult to let go of one's image of a child, say goodbye to the child a parent knows, and get accustomed to this slightly new child inhabiting the known child's body.

Child care is an invisible part of the economy.

Often, when there is a conflict between parent and child, at its very hub is an expectation that the child should be acting differently. Sometimes these expectations run counter what is known about children's growth. They stem from remembering oneself, but usually at a slightly older age.

It gives us more flexibility, so we can do more, but it also creates the expectation of the instant response. It can take away your sense of control over your time.

Cultural expectations shade and color the images that parents-to-be form. The baby product ads, showing a woman serenely holding her child, looking blissfully and mysteriously contented, or the television parents, wisely and humorously solving problems, influence parents-to-be.