Amazon.com : Chalktastic Chalkboard Markers for Kids Set of 8 Washable, Erasable Chalk Ink Dry Erase Pens for School, Chalkboard Menu Board & Glass Car Window - Neon, Pastel, White Chalk Pens -
Chalk vs Liquid Chalk Markers - Comparing two types of chalks + Art Addicts Alliance Birthday! - YouTube
Amazon.com : VersaChalk Classic Liquid Chalk Markers for Blackboards (10 Pack, 3mm, Fine Tip) - Erasable Washable Chalk Pens for Chalkboard Signs, Windows, Glass, Events, Schools, Office Supplies, and Business : Office Products
Chalk Ink Chalkboard Marker Chalk Chickarts White 6mm - Etsy