Egg Carton Mania, part of the "Mania" Craft Books series, Children's Press, 2002, has directions for 12 easy-to-make projects using empty egg cartons. Make your own double-decker bus, super sailboat, or silly snowman. Save your empty milk cartons (And have your friends save theirs!) so you can make all the projects in the book. Most of the projects shown in the book were made using cardboard egg cartons, but some of them can be made using foam egg cartons.