The neonatal period covers the first 28 days after birth. During this period, newborns may experience problems such as jaundice, restlessness, nasal congestion, respiratory distress, and vomiting, and for these reasons, children can be brought to the emergency services. From the moment they enter the emergency room, they are exposed to sensory stimuli in the form of bright lights, loud and unusual sounds, and new tactile experiences. This creates an uncomfortable and stressful experience for them. At the same time, performing invasive procedural interventions in an environment where stimuli are intense causes pain. Newborns give physiological, behavioral and metabolic responses depending on the pain and stress they experience. Persistent exposure to these interventions and lack of appropriate approaches may lead to deterioration in pain perceptions and neuroendocrine stress responses, and permanent neurological and behavioral problems may develop over time. For this reason, pain in newborns and the problems caused by stress should be known, appropriate pain relief methods should be selected and comfort should be provided. However, pediatric emergency nurses who perform the procedural procedures of newborns whose rates of admission to pediatric emergency services are reported as 2-3% may not have sufficient experience in pain management. Pediatric emergency nurses need to be supported in order to increase their awareness of newborns and to continue their pain management. Although there is a large literature examining the effects of individualized developmental care practices in painful invasive procedural procedures for newborns, there are no studies examining the effects of these practices in painful invasive procedural procedures in pediatric emergencies. In this context, there is a need for an environment in which invasive procedural procedures specific to them are carried out in pediatric emergency services for newborns with the highest sensitivity to environmental factors and susceptibility to infections. In this study, newborns will feel safe, protect their flexion posture, and be protected from noise and light during the venous blood collection procedure, which is unique and cost-effective in terms of its applicability in each pediatric emergency department, thus reducing the pain caused by the procedural procedure and providing comfort. It is aimed to develop and evaluate the effectiveness of the portable therapeutic baby nursery. With these aspects, it is the first study in the literature to be conducted in the pediatric emergency department and will be carried out in two stages. In the first stage of the study, a portable therapeutic baby nursery will be developed, and in the second stage, its effectiveness during venous blood collection will be evaluated. Nest is an environment specific to newborns in the medical field; thanks to its design; It helps newborns to reduce the light and sound that they will be exposed to in a noisy and high light environment such as a pediatric emergency, to provide comfort and reduce pain by therapeutic touch and maintaining their therapeutic position, at the same time to protect body temperature by preventing contact with cold material such as linoleum on the stretcher and over the stretcher. will contribute to the prevention of exposure to any infectious agent. Thanks to this new and field-specific application, information about the individualized developmental care practices of newborns in the pediatric emergency service will be provided to the literature.