The majority of Australian children aged between 14–18 have a smartphone. Children at this age are concerned more with sharing information with their friends than with protecting their privacy. For this reason, they tend to leave their smartphone's default privacy settings on making it possible for anyone to discover their movements. This project aimed at raising children’s awareness about the security issues associated with their smartphones. M5Stack Core 2 ESP32 devices programmed to detect Bluetooth and WI-FI signals were installed around two high school campuses in Australia to capture traffic within their range. Children were then informed of the presence of these network sensors in their campuses, during a cyber safety lesson in which they were shown how to modify their smartphone privacy settings to prevent their smartphones from sharing information about them without their knowledge. Samples of data extracted from the network sensors before and after the delivery of the cyber safety lesson were compared to find out if the children in these two schools changed their smartphone settings to stop their sensitive information from escaping from their smartphones. The outcome of the analysis of the before and after data showed that the volume of traffic captured from smartphones after the cyber safety lesson was significantly less than the volume of traffic captured before the cyber safety lesson, suggesting children must have benefited from the lesson.