It's true! with a circular sock machine you can crank out a pair of socks in less than an hour. I'll go over some of the history of these machines and show how to hang a cuff, mock rib, turn a heel, make the sock the correct size and finish with a toe.
If they have a machine it needs to be in working order with a basic understanding of how it works. They will need a way to cast on, some waste yarn and paper for taking notes.