Communication

Who's harder? First boys, then girls

From birth, a girl baby tends to be more interested in looking at colors and textures, like those on the human face, while a boy baby is drawn more to movement, like a whirling mobile, says Dr. Sax. (These differences play out in the way kids draw: Girls tend to use a rainbow of hues to draw nouns, while boys lean toward blue, black, and silver for their more verblike pictures of vehicles crashing and wars.) In a nutshell, girls are rigged to be people-oriented, boys to be action-oriented. Because girls study faces so intently, they're better at reading nonverbal signals, such as expression and tone of voice. Boys not only learn to talk later than girls and use more limited vocabularies, they also have more trouble connecting feelings with words.

"While most girls share their feelings and details of events, my three sons honestly don't see that as important. I spend my days asking, 'What happened then?' or 'What did he say after you said that?'" O'Donnell says.

Important note: Because boys hold eye contact for shorter periods than girls, parents may worry about autism, since this can be a red flag. "It's a relief for moms to know that this is normal and comes from the way the brains are set up," Gurian says.

As girls get to be 8 or so, things can get harder: The flip side of being so adept at communicating is that girls exert a lot of energy on it. There can be a great deal of drama around who's mad at whom, who said what and why, and more. Start when your daughter's a toddler to establish an open communication, so she learns she can come to you for advice.