One thought. I didn't do anything with these butterflies except stick them up with masking tape. BIG MISTAKE when the babies are sick and you turn on the humidifier. I walked in the next morning and my butterflies had all wilted. They are currently residing in my husband's huge engineering textbooks to try and flatten out. Since the humidifier is a very common addition to that room, they need protection. I wish I had run them through a laminator before. I think they also needed some sparkle. They will be so much happier in all that fog if they are sealed up safely.
Have fun creating clouds of butterflies!