While doing home visits for 3 or 4 years olds who have never been in preschool, I take a blank cut out butterfly shape to the child's house. I tell them that they may decorate it with their family however they want and bring it to school the first day back. (It usually takes a couple of days to get them all back.) When they bring it in I take it to the bulletin board and hang it up with their help. They love telling me how they did it and who helped. Great way to get families involved. You can also do a theme on butterflies to tie it all together. You can watch them emerge from their crysallis and then let them free.