Write messages on the inside of your windows – try writing backwards if you want them to be read outside. No worries if you make a mistake because you can always wash it off and start again. Have fun decorating mirrors by drawing pretty designs around the edges, just like a picture frame. Or you could design on the outside of a glass vase to match your fresh flowers. Look around the house for more great surfaces to decorate with Crayola Washable Window Markers. Each pack includes 8 Crayola Washable Window Markers including primary, secondary and neutral colors. Sold as 3 packs for a total of 24 markers.