It is common to identify the ability to recognize advertising as a requirement for the development of a critical attitude towards commercial content. This paper reflects on the perception parents have of their children who, as active users of mobile devices, are recipients of advertising. We thought interesting to draw a comparison between parent and child responses to corroborate the level of consistency between adult perception and what children stated regarding their attitude towards the advertising to which they were exposed. In order to do so a survey was applied in dyads in 501 households in the Metropolitan Area of Santiago de Chile showing that parents and guardians tend to underestimate the trust that children place in the advertising appearing on the channels they watch most on their mobile devices. It is needed a ground a solid starting point to enable subsequent research on childcare, content supervision and parental and social mediation.