Crayola Washable Sidewalk Chalk, Multi-Colour, 64 Count (Pack of 1) : Amazon.co.uk: Toys & Games
Crayola Washable Sidewalk Paint - Neon Paint and Chalk Set - Water-based - Low Odor - Low VOC - Easy Cleanup in the Craft Paint department at Lowes.com
EASY, Vibrant Washable Sidewalk Chalk Paint for Kids
RoseArt Washable Sidewalk Chalk Paint Set, 40 pc - City Market