Many children have used sidewalk chalk to create drawings, make hopscotch boards, or write notes and signs. When fine artists take to the sidewalks with their own ideas, the materials and setting are still very relatable for–and interesting to– kids, even if the products are quite different. The artists of this year’s Northampton Chalk Art Festival on Friday, September 11, everyone is invited to observe as they create new masterpieces on the sidewalks downtown.