You're all set. You've prepped the yard for an influx of trick-or-treaters, you bought (or made) your child a safe costume, the evening's plans include only trick-or-treating in well-lit, familiar neighborhoods -- what else can you do to make sure your kids have a safe and happy Halloween? Make sure they can get in touch with you.
Kids going out with a group of friends should carry a cell phone with them in case of emergency. All kids should know their home phone numbers and know how to dial 9-1-1 before going out for trick-or-treat, especially the little ones who might accidentally get lost.