Children's awareness of male and female develops in stages, well before they begin to attribute roles to the sexes, writes Penny Tassoni 'What are little boys made of?' goes the refrain of a traditional nursery rhyme. These questions about gender are still with us in the 21st century, as the gap between the achievement of boys and girls widens. Gender is currently a hot topic, with conflicting viewpoints often falling into one of the two camps, nature or...