We bought this box of extra bright chalk from Target for $3.99 and headed to Central Park to create something beautiful. We stopped on the sidewalk that surrounds the Great Lawn. It was Ella's spontaneous/brilliant idea to start coloring in all the hexagons on the sidewalk. If anyone wants to color the entire sidewalk surrounding The Great Lawn, count us in. One rule: Ella gets the credit, unless it's somehow against the law or already been done before.