Amazon.com : 18 Classic Neon Chalk Markers Double Pack of Both Fine and Reversible Medium Tip Liquid Chalk Pens Wet Erasable - Menu Boards, Glass, Windows, White/Chalk Boards, Classrooms, Mirrors, Plastic :
Amazon.com : Liquid Chalk Markers Pens - 24 Colors Washable & Wet Erase Neon Chalk Makers for Blackboard, Chalkboard Signs, Glass Window, Graduation Celebration School Kids Art - Erasable Window Markers for