Sidewalk writing medium

CHALK

Think of what teachers use to write on blackboards or what kids draw with on pavement—it’s soft, dusty, and comes in sticks.

"Sidewalk writing medium" points to chalk because it’s the common material kids and artists use to draw on pavement. The clue plays it straight—no wordplay or tricks—just a direct reference to how chalk is often used outdoors. If you’ve ever seen colorful messages or hopscotch grids on a sidewalk, chalk was likely the tool.