Preventing child separation : How to prevent children from being lost

Do parents talk to their children on what they should be doing if they are lost?  Listen to the radio https://www.facebook.com/100000165708293/posts/4455876031094543/ and start talking with children on  finding police , shops, public program  to tell that  he/ she is lost . The adult who finds them should call104, 100. Also teach children to memorize the phone number of parents if they can.