Alicia Lieberman draws on decades of clinical work and developmental research to illuminate the emotional world of children between one and three years old—a period marked by explosive change, intense feeling, and behavior that often baffles caregivers. She explains why toddlers say 'no' to everything, why they melt down over seemingly trivial frustrations, and why their moods can shift instantly from joy to rage. Lieberman frames toddler behavior as the product of conflicting developmental imperatives: the drive toward autonomy clashing with continued dependence, the emergence of self-awareness creating both pride and shame, the development of language that cannot yet capture complex internal states. Her case studies show real families navigating these challenges, offering readers the relief of recognition and concrete strategies for response. Lieberman addresses toilet training, sibling conflicts, separation anxiety, and the arrival of new babies with practical wisdom grounded in research. She also explores parental responses, acknowledging that toddler intensity triggers adult emotions—anger, frustration, guilt—that require their own management. Her tone balances professional expertise with compassionate understanding that parenting toddlers is genuinely hard. This revised edition incorporates new research on brain development and the impact of stress on young children while maintaining the accessible style that made the original a classic. Parents and caregivers will find both explanation and reassurance that their toddlers' challenging behaviors are normal and navigable.