They're free at www.tickerfactory.com, but make sure you pick an 'event' one or you'll accidentally end up charting your ovulation cycle or something. All you have to do is use the 'insert widget' button when you're composing your post. Even a webmong like me can do it.
You should treat yourselves - they have backgrounds made out of textbooks, snakes and worms, and place markers of pens, pencils, skulls and crossbones... plenty fun.
Comments
True enough. Great tag, by the way.