Unlike existing interventions, the customizable STM program provides a simulated hospital environment that can not only educate, but also increase children's coping abilities to better prepare them for surgery. In addition to reducing children's PA, it can also play an important role in reducing parental anxiety by preparing parents with a knowledge tool to support their child throughout the surgical process.The investigators believe that STM is a promising tool to improve children's health and ease the familial and societal costs of PA in an easy and cost-effective way. Given that many children in other hospitals do not receive adequate preoperative preparation, STM has the potential to provide proper perioperative care for every child in need.