One place in my room that I spent a lot of time in front of was the mirror on the back of my door. I used it to figure out the whole makeup thing, rock out to music, and make sure I looked cute in what I had picked out for the day. Like everything else in my room, I couldn't just let it be and I had to decorate it somehow; This is how I accidentally discovered that fabric paint could be used to make window clings.
You can take fabric paint and paint directly onto the glass surface. When the paint dries, it stays stuck to the glass, but can be peeled off later. I had my "clings" on my mirror for about 3 years and was still able to remove them easily and without damage to the glass.
I thought I would share this trick. What a great craft for the kids to do in their bedrooms or on your windows for the holidays! If anyone tries it out, I would love to see what you come up with!