The U.S. Fire Administration have countless free publications available on their website. They have a whole host of pictographs, fire prevention posters, inforgraphs, handouts, pamphlets, and more.
I didn't order any since I'm a bit paste the stage where I put posters on my wall, but I'm sure there are a few parents out there who might be interested in getting a few for their kids. It's either these or a bunch of Hannah Montana & High School Musical posters, which incidentally are the #1 source of fires in the Goob household. I can't stand those freaking things and watching them burn is fun!