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
24 PCS Washable Sidewalk Chalks Set Non-Toxic Jumbo Chalk for Schools, Outdoor Art Play, Paint on Chalkboard, Blackboard and Playground : Amazon.co.uk: Toys & Games