When I was about to attend the SAFF fiber fair, I created a brochure about machine knitting, which we printed in color on both sides of the page and then folded in thirds (a Z-fold). We wanted to give them out at the event, because we thought there'd be lots and lots of people who had never heard of or seen a knitting machine. I entitled it, "Are You Curious About Knitting Machines?" and put in lots of color photos of projects and referred readers back to this blog, where I have so much information about knitting machines.
It was a good thing, too, that we had brochures, because my class was in an out-of-the-way place, and people weren't going to see the knitting machine or samples just by walking by! We put the brochures at the main exhibit hall entrance.
If you think this might be useful to you when people ask you what a knitting machine is, you're welcome to use it! It's a .pdf file. Click here for a copy. You can save it to your computer and email it to friends, or you can print it out to give away.