Introduction: The psychomotor development of the child depends on the parents, but mainly the brothers and grandparents participate. Objective: To describe the participation of the family in the early psychomotor stimulation of older infants living in a marginal urban area. Methods: Qualitative ethnographic study. The sample was represented by 15 mothers of older infants who attend the growth and development control at their local health center; The data were collected in their homes through the interview, participant observation and field diary and were processed through thematic analysis. Results: a) Stimulation of fine and gross motor skills, b) Stimulation of language and cognitive learning c) Socio-affective stimulation and learning of values. Conclusions: In this study, the family members stimulate the older infant in their daily lives through play, using materials from the home, toys, technological equipment such as television, radio and cell phones. However, cell phone use should be controlled to avoid eye, cognitive and addictive problems. Therefore, it is recommended that the primary care nurse assess their practices at home before providing health education on infant stimulation. © 2022 Authors. All rights reserved.