Abstract: This paper focuses the child safety wearable device. The main concept Node Guard represents a novel approach to child safety through the integration of NodeMCU technology. This wearable device leverages the power of NodeMCU, an open-source IoT platform based on the ESP8266 WiFi module, to offer real-time monitoring and tracking functionalities. NodeGuard employs GPS and WiFi positioning systems to accurately track the child's location, providing parents with timely updates through a dedicated mobile application. Additionally, NodeGuard features biometric sensors to monitor vital signs and detect potential emergencies, ensuring rapid response in critical situations. The integration of NodeMCU technology enables NodeGuard to be highly customizable, allowing for the addition of features such as geo-fencing and SOS alerts. With its compact form factor and low power consumption, NodeGuard offers a reliable and efficient solution for ensuring the safety and well- being of children in various environments. Child safety is a paramount concern for parents and guardians, especially in crowded or unfamiliar environments where children may be at risk of getting lost or encountering danger. In response to this challenge, this project proposes the development of a child safety wearable device using NodeMCU, an open-source IoT platform based on the ESP8266 Wi-Fi module. The project will be conducted in multiple phases, including design, development, testing, and evaluation. Throughout these phases, considerations will be given to factors such as battery life, connectivity, and data privacy to ensure the effectiveness and reliability of the device. Overall, this project aims to contribute to the development of innovative solutions for ensuring the safety and well-being of children in an increasingly connected world. By leveraging the capabilities of NodeMCU and integrating them with advanced sensors and communication modules, the proposed child safety wearable device has the potential to make a significant impact in safeguarding children in various situations.