Abbie the rainbow butterfly princess. I found that dress at Goodwill, added the ribbon trim and sewed little butterflies all over it. After debating whether to make or buy wings, I ended up buying those since they were so pretty (and cheap!).
Isaiah the yellow butterfly. Given his sensory issues, I wasn't sure what he would be willing to wear (he usually likes accessories, but other times, no way). So, I found an old hoodie, and sewed the wings (made from shiny material, thin batting and interfacing) on the back. That way, it wasn't any different than wearing a jacket. (I totally forgot to make him a treat bag, though.)
And, last but not least, Oliver the caterpillar. Just made him a fleece romper, since I wanted something warm and comfortable (as he was going to be in the MT).
Bonus picture of Ollie... this is how our night ended- extremely tired and whacked out on sugar.
I hope everyone had a wonderful Halloween, and blessed Samhain!