For school-age children aged 6-12, hospitalization and surgery mean a process full of worries causing anxiety and fear. In the preoperative period, children may feel threatened by being in an unfamiliar environment, seeing unfamiliar faces with masks, hearing the alarm sounds of devices, being exposed to medical procedures, and experiencing parental separation and parental anxiety. Preoperative anxiety is an important issue in pediatric patients because postoperative anxiety is related to preoperative anxiety and anxiety experienced at the beginning of anesthesia. The success of the surgery in children is related not only to the importance of the techniques and skills applied but also to the pre-operative preparation of children and meeting their and their parents' care needs. Therefore, preparing the child for the operation appropriately, being aware of the causes of anxiety and taking preventive measures in the preoperative period are very important for the physiological health of children and their parents. If the child is prepared for the operation in accordance with the procedures in the pre-operative period, it prevents the child from experiencing behavioral and physiological symptoms of anxiety. In children who are psychologically affected in the postoperative period, maladaptive behavioral changes such as anxiety, eating and sleep disorders, nightmares, enuresis, and tantrums are observed during the preoperative period. As observed in several studies, children whose anxiety levels are high in the preoperative period experience more complications during the postoperative recovery period. In addition, such anxiety experienced by children in the preoperative period causes them to stay in hospitals for a longer time (prolongs their hospitalization) in the postoperative period, which increases the burden and costs of health care significantly. In a study, it was observed that distracting 4-10-year old children's attention with tablets and phones in the pre-operative period decreased their stress and postoperative delirium, and anxiety experienced by their parents, and increased their cooperation with health personnel during the induction of anesthesia. Therefore, relieving preoperative anxiety not with pharmacological methods with side effects and potential risks but with non-pharmacological methods is of great importance.The use of non-pharmacological methods in children has been determined to be effective and safe. When which approach is to be applied to children is decided, the child's age, cognitive status, coping mechanisms, skills to keep up with digital age and use the technology should be taken into consideration because today's digital technology not only affects the whole world but also affects and changes the lives of children. Educational multimedia applications, web-based programs, visual and auditory technological tools are used to reduce children's preoperative anxiety and to create a more enjoyable experience by distracting their attention. With the latest developments in technology, lively, immersive and virtual reality systems have been included in the pre-operative preparation training of especially pediatric patients. Virtual reality technology enables children and their parents to be acquainted with the physical environment such as the operating theatre and recovery area in hospital environments they have not been in previously. A virtual reality tour, which is shown to children in the operating theatre before they undergo anesthesia, enables them to have a realistic, actual and inexpensive experience.Two mechanisms explaining the effect of virtual reality on anxiety are described as "exposure to the environment" and "distraction".Recent studies conducted on this issue show that virtual reality, an immersive technology, is an effective intervention to reduce preoperative anxiety in children. In randomized control studies conducted to determine children's preoperative anxiety levels, it was determined that the anxiety levels of children who used virtual reality technology were significantly lower than were those who of children did not use such technology. Preparing the child psychologically and eliminating his or her fear and anxiety in the pre-operative period will reduce the amount of anesthesia during the operation and that of analgesics after the operation, and will accelerate the child's recovery and early discharge. This will also reduce parents' anxiety. Therefore, the pediatric nurse should make the child be acquainted with the operation process by providing information to the child and the parent within the preoperative preparation programs, and teach them coping strategies by supporting them with emotional expressions.

The hypotheses of the present study are as follows:

H1: The operating theatre tour shown to children with a 3D virtual headset before the operation reduces their fear and anxiety.

H2: A documentary shown to children with a 3D virtual headset before the operation reduces their fear and anxiety.