In the particular intervention program described, children under 3 years of age are given a nursery school type of experience five days a week for eight or more hours a day, with program emphasis on stimulating retarded development. Mothers are given inservice training averaging 3 hours per week, stressing development of mothers' self-concept, general handling of the child, language development of the child, physical care, and development of child's gross and fine motor control. A minimum of 10 weeks of paid participation as a teacher aide is available for each of the mothers. Data are reported for an 11-month period on 18 families from two centers that primarily serve Chicano migrant families. Children were pre- and posttested on measures to determine motor, language, and social development and, in addition, a test was given to assess the stimulation potential of each child's home. Conclusions must be tentaive in the absence of a control group, but posttest scores indicated a significant improvement in the amount and quality of developmental home stimulation. Subtest scores showed the greatest improvement in the areas of language development and developmental and vocal stimulation. (NH)