Crayola Glow Chalk Monster Madness: * Colorful glowing sidewalk chalk provides kids a new way to play at twilight * Utilizes breakthrough glow-in-the-dark technology * Glows for up to 4 hours * Contents: * 2 chalk dust bottles * 2 glow sand packets * 1 molded tray with 4 shapes * 1 funnel * Makes 4 pieces of chalk * Easy cleanup