On a recent trip to a craft store with a coupon burning a hole in my pocket, I found this kit to make 10 crepe paper flowers. They aren't anything like the ones I made in high school or for weddings but they caught my attention and triggered a memory. I chose the white kit with absolutely no intention of leaving it white.
This was a happy experiment and they will in my bedroom until they either fade (not sure how the color or paper itself will endure) or until they get too dusty. I would do this again, but with a larger, deeper box so that the spray could be more of mist falling on the paper, or maybe done outside on a windless day.