This trial is testing two different amounts of a sedative drug called Dexmedetomidine in young children. The goal is to see if it reduces the amount of another anesthetic, Sevoflurane, needed during surgery. Dexmedetomidine helps calm the patient and reduces stress, which means less Sevoflurane is required. Dexmedetomidine has been studied extensively for its sedative effects in children, showing benefits in reducing the required dose of other anesthetics like Sevoflurane.