Believe it or not my daughter 21 years old uses them on the windows at Holidays and when she babysit the children and herself write on her double hung mirror sliding closet doors are covered with messages.the she watches come to visit and my daught is at school they have to run up with the markers and draw a picture and leave a message I love it. When I bought them I only thought of them for writing on the windows. Use Windex or wet paper towel and they wipe right off!! And don't for get about you're car windows you can write on those too, let's cheer your kids on!
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