This document is Part I of a two-part project whose goal was to identify the sequential development of child behavior from birth through age seven and to identify the materials which could be used to strengthen or initiate a behavioral facet. Research on child development was collected, organized, and analyzed for correlative events pertinent to the developmental taxonomy. A survey of materials produced by American manufacturers was made. Section I of the document is the introduction, and Section II reflects physiological development emphasizing motor development, sensation, perception, and learned responses. Section III covers cognitive development, Section IV investigates communication skills, and Section V reflects social and personality development. Section VI is composed of summary graphs indicating the information gained in the developmental study, and Section VII contains an extensive bibliography and a subject index to the bibliography. (DO)