The general objective of this investigation is to analyze the use of technologies and their impact on the child's development and the specific ones, to identify which are the means used by children; identify the intensity of use of the most common technologies; analyze how those responsible person are monitoring the use; identify the benefits and harms that technologies bring to children's lives. The study was carried out in the Basic Health Units of a city in the interior of the state of São Paulo, where the responsible person for accompanying the child is interviewed. We opted for content analysis, thematic modality. The study made explicit that television and cell phones are the most accessed technologies. Data analysis allowed us to identify four themes: A) The watched content in accessing technology; B) The use of technology changes behavior; C) Monitoring the use of technologies and D) Child development and use of technology.