Chalk  

Here's a cool way of celebrating National Poetry Month. Something similar to this happens here in Oak Park (though it's not limited to April) -- someone goes around stencilling poems on the sidewalk with spray paint. I'll try to post a picture of the phenomenon later.

The above link comes by way of Shanna Compton, who's also celebrating National Poetry (Writing) Month in kind of an interesting way: she's writing a poem (almost) every day, but then expunging it shortly after it's posted, so that you have to visit at just the right time to catch it. Nothing yet today...