A HUGE AMOUNT of action and reaction – or cause and effect – goes on in a baby’s first year. As she zooms through the stages of development, her brain doubles in size. At birth, she is little more than a bundle of reflexes; by six months, she can

Most children start talking between about nine and 15 months, starting to enunciate clearly at about two years. However, not all children find language so simple and still haven’t produced their first words when all around them are already nattering