Wrap a tissue around a hardboiled egg and dip in vinegar. Roll the egg in your palm until the tissue is stuck close around the egg. While still moist put the egg in the carton and apply drops of dye to egg. You may use one color or several. Roll the eggs around until the dye is applied to all sides. Leave in carton to dry overnight (a small fan helps). Peel tissue off of dry egg and apply a small amount of cooking oil using a slightly damp paper towel.