I got this idea from Ms.Griffin who posted her OOT guest brochures. I had previously been looking to buy crossword puzzles for my OOT guest boxes but did not want to spend too much money.
I did a little research and stumbled on the Discovery Education Puzzle Maker. This is a free tool where you can create FREE personalized puzzles.
Here are some screen shots of a trial crossword puzzle that I made:
Entering in the answers/clues: