Will this burn me?

I've answered a lot of questions as a teacher, but I've never answered this one before.  In Orientation to FACS we are starting to sew.  Wednesday marked the beginning of the pillowcase project.  I was explaining expectations for the day and procedures for putting away supplies and irons and ironing boards.  The kids got to work and one girl who had just plugged in the iron asks, "Will this burn me?"  I looked at her for what seemed like a long time trying to put together a response that wasn't as sarcastic as the thoughts running through my head and finally replied yes, irons get very hot and will burn you if you touch the metal part.  She then proceeded to ask, "how will I know when it gets hot?"  Trust me you'll know.  Some days all I can do is shake my head.