Decorate your windows with chalk markers — Hester's Handmade Home
Freehand patterned rainbow I drew on my window this weekend using chalk marker pens. I love seeing window drawings on my daily walk around the block. : r/CasualUK
How to Draw and Write on Windows With Liquid Chalk Markers - FeltMagnet
Liquid Chalk Markers For Chalkboard Wet Erase Metallic Colors Pens Window Markers With Reversible Tip For Blackboard, Whiteboard, Glass, Mirror, Menu | Fruugo UK