MLKday.gov is giving out free Martin Luter King promotional materials. Their goal is to help you think of Martin Luther King Day as a Day of Service, not a day off. You can order from posters, bookmarks, stickers, door hangers, fact sheets, and a DVD.
Martin Luther King Day is coming up on 1/17, so this would be a great way to help teach your kids (or class!) what the day means.