Mother's Recorded Voice Versus Dexmedetomidine on Postoperative Agitation

Children will be assigned to listen to the mother's recorded voice at 2 times (in the holding area 3 minutes before induction of anesthesia till induction of anesthesia is ended) and (during emergence from anesthesia till complete recovery).

Children will be given a single bolus of dexmedetomidine 0.2 µ/kg IV at 2 times (in the holding area 3 minutes before induction of anesthesia) and (at the end of surgery).

Children will be given the same volume of saline at 2 times (in the holding area 3 minutes before induction of anesthesia) and (at the end of surgery).