Bring 1 cup water to a boil in a saucepan. Stir in 1/4 cup sugar; reduce heat and simmer for 2 minutes, until the sugar dissolves. Cool completely.
Use a pen or pencil to punch a hole near the top of a sponge. Travis loved this part! Thread twine or string through the hole.
Carefully submerge the sponge in the sugar syrup. We found that it helped to use a stick to push the sponge down, so our fingers didn’t get sticky.
Hold the sponge over the bowl to let any excess drip off, then hang some place that will attract butterflies outside.
The craft was beautiful already, even without any visitors. I will post an update picture if a butterfly comes calling!