Sharpie 3-Pack Medium Tip Red, Yellow, and Blue Wet Erase Chalk Marker in the Writing Utensils department at Lowes.com
Amazon.com : Chalkboard Markers Set of 8 Washable, Erasable Chalk Ink Dry Erase Pens for School, Chalkboard Menu Board & Glass Car Window - Neon, Pastel, White Chalk Pens - Gifts for