The observation sheet for children under 3 years old with the development snail is a comprehensive tool for professionals in early childhood education. This book offers an updated and revised edition that contains valuable information on methods, support ideas, and criteria for observing toddlers. It includes ten different observation sheets specifically tailored to the developmental needs of children under three years old. The author, Kornelia Schlaaf-Kirschner, wrote the work in German, and it was published in 2025. With a stapled binding and a total of 88 pages, the book provides a practical and user-friendly resource for educators, teachers, and other professionals who wish to support the development of toddlers in a targeted manner. The development snail, as a central element of the observation sheet, allows for structured and comprehensible documentation of the children's progress, facilitating individualized support and targeted interventions.