A couple of years ago, I hosted a cardmaking session as part of an office women's networking event. I designed and made four different card options, and one of my co-workers from a different group very nicely came over the Saturday before the event to help prep, which involved cutting, stamping, and embossing to make kits for each card.
As part of the event, the cards that were made were sent to Operation Write Home (this was when they were still taking card donations). I left the sentiment blank for each card kit so that people could stamp their own following the Operation Write Home guidelines.