This great project is one I did at school with the kindergarten kids and decided to enlarge on it a little for the family arts & crafts group. We do not regularly keep paper egg cartons at the library and my supply was low but a request to the neighborhood wblistserve produced enough for this program and another besides. The project uses a TP roll that is first decorated then cut in about 1" from the bottom to form a base to glue to the lid of the egg carton. We used ribbons as hangers to thread through the holes in both ends of the carton and tied them at the center with another ribbon to use as a longer hanger.
We added a pine cone with peanut butter and sunflower seeds to the end of the tray for the bigger birds.This was a lot of fun and we were able to discuss a little the kinds of birds that might visit. I wish a safe glue would hold the tube to styrofoam as these could be placed out in the weather but I haven't found one I'd like to use at this point.
I have posted a list of food for feeding the birds from a fellow gardener.