Considering the emphasis on safety in health care, new methods for training qualified nurses are being considered. The use of simulation technologies to provide regular and repeated training for qualified nurses in the management of paediatric emergencies has yet to be investigated. This paper presents the results of a study designed to determine if and how a period of regular simulation training in the management of paediatric emergencies improves qualified nurses' clinical confidence. A mixed methods design was employed using a group of qualified paediatric nurses (n=20) who were matched into two groups. The intervention group (n=10) received three simulation-based training sessions and the control group (n=10) had no training. Each nurse completed a pre- and post-clinical confidence questionnaire and were interviewed. Results demonstrated a statistically significant improvement in confidence following simulation training, which was explained by the provision of insight and preparation for real life. Further research should aim to replicate these findings using larger sample sizes and direct assessments of nurses' clinical performance.