Take a coffee filter and have kids color them with washable markers. Then let them mist the coffee filter with water from a spray bottle. Let it dry, and have them pinched into a butterfly shape with pipe cleaners or clothes pins.
I& putting together a Valentine project to do with 3 year graders. I had the idea to make butterflies from coffee filters and clothes pins, which there lots of samples of online. I& hoping it& a craft that even.