For competent care of children under three years old, knowledge ranging from physical, psychological, and social development to the design of educational everyday life is essential. This book conveys this knowledge in an understandable manner. Following each chapter, there are questions for knowledge assessment and practical assignments. Topics include developmental psychology, attachment and relationships, the role of professionals in daily routines, care, health, nutrition, early childhood education (music, language, movement, play, nature), and social context. The book is also suitable as a reference work for educational professionals in practice.