An easy way to make a flyer or a poster for advertising a workshop is by using Microsoft Word. You need to create a page and format it with the "Boarders and Shading" option. Choose the appropriate color to use and use the "Drawing" toolbar to select the various shapes you are going to use. Make sure that you use interesting titles and colorful graphics. Find more tips from http://www.overnightprints.com/make-your-flyers-stand-out.