I found two more fun interactive sites. I’m sorry I forgot where I found them. If you told me about them, thank you.
Warning Sign Generator lets you create caution signs.
Dictionary Page lets you create Dictionary Pages with images.
This second site also lets you create some other signs if you look at the top left on the main page.
Newspaper Headline Generator (thanks John Rivera).
Also see: Favorite interactive sites of the year.
500 more sign generators @ http://www.SignGenerator.org (churches, restaurants, business and product labels).