Working with the youngest children requires patience and a deep understanding of the path of human development. Assistants to Infancy practitioners are trained to support families and children through the stages of pregnancy and birth and to work with children during the earliest years. Two distinct Montessori environments, the Nido and the Infant Community, emerge as places which can meet the constantly changing needs of children of this age group. The guide’s role requires acquiring a healthy respect, knowledge and recognition of nature’s design for development, cultivating an understanding of the usefulness of collaborative relationships with both family and the child, and stresses the vital importance of providing a setting filled with enriched language and movement opportunities for the child. The most profound period in a child’s life, this is the foundation for all to come.