I am not sorry at all. But this is waaaay off topic... kinda.
I read a blog from time to time called Art of Manliness. Today they did an "old fashioned" instructional graphic on what it means to gird up your loins.
I just had to share it. This might be good for one of your Sunday School classes.
The Art of Manliness | How to Gird Up Your Loins: An Illustrated Guide