Based on Burton White's thirty-seven years of observation and research, this detailed guide to the month-by-month mental, physical, social, and emotional development of infants and toddlers has supported and guided hundreds of thousands of parents. Now completely revised and updated, it contains the most accurate information and advice available on raising and nurturing the very young child. White gives parents real-world-tested advice on creating a stimulating environment for your infant and toddler; using effective, age-appropriate discipline techniques; how to handle sleep problems; what toys you should (and should not) buy; how to encourage healthy social development; and how and when to toilet-train.