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I trotted past the lawn to the edge of the driveway and spotted a giant stick of blue sidewalk chalk resting by the curb! It was as thick as a tree trunk to me, with one rounded end already scuffed flat. I leaned forward, planted my boots firmly against the asphalt, and shoved it with all my might! The chalk rumbled with a dry, scraping crunch, rolling just enough to grind a bold blue stripe straight across the gray pavement. A tiny cloud of powder puffed up around my toes! Now there is an official track marker right in the driveway!