The manual is intended to help parents and professionals understand the motor development of Down's syndrome infants and young children. Following an overview of motor development, gross and fine motor landmarks are presented along with exercises and activities to promote their development in infancy, toddlerhood, and childhood. Each landmark is described in terms of developmental age for normal and Down's children. Illustrations are provided along with lists of suggested activities. Appendixes include information on the developmental progression of specific gross and fine motor skills, sequenced activities to develop each terminal landmark, and resources (associations, periodicals, parent groups, books, and pamphlets). (CL)