CRAYOLA Outdoor Chalk - Assorted Colours (Pack of 12) | Perfect for Drawing on the Pavement or Patio - Easily Washes Away with Water! | For Ages 4+ : Amazon.co.uk: Toys & Games
Crayola Paint and Clay Washable Sidewalk Chalk : Amazon.co.uk: Toys & Games
Crayola Outdoor Sidewalk Chalk | Product Demo Video - YouTube