Eggshell Pictures You can make "Stained Glass" pictures using small pieces of colored eggshell. Either use the shells from the eggs you colored for Ostara or follow the instructions below to color eggshells from either hard-boiled or raw eggs. Materials Eggshells Posterboard (or cardboard from cereal or detergent boxes) White glue Food coloring White vinegar Paper towels and/or newspaper   In a cup or small glass bowl, mix a few drops of food coloring with about 1/2 c. white vinegar for each color you wish to use. Soak the egg shells in the food coloring until you have the color desired. The longer they soak the darker they will be. You may wish to crush the shells into small pieces before putting them into the coloring. Remove the colored shells and spread on paper towels or newspaper to dry. Draw a simple picture on the plain side of the cardboard. Coloring book pictures are good. Spread glue in each area of your drawing. Glue small pieces of colored shell in the different sections of the drawing. Allow the glue to dry completely before moving your picture.