Gather hard boiled eggs, vinegar and food coloring. Bring newspaper, cups, spoons and an empty egg carton to the work area.
Prepare an area to color the eggs by putting down newspaper. The newspaper catches any drips or spills.
Boil enough water to add approximately 1/2 cup for each color of dye you plan to use.
Mix 1 teaspoon of vinegar and 1/2 cup of boiling water in a cup for each color you are creating. Any variety of vinegar is suitable.
Add approximately 20 drops of food coloring into the cup of water and vinegar. Repeat this step for each color. You can use two different colors of food coloring to mix new colors.
Dip the hard boiled eggs in the colored mixtures. The longer you leave the eggs in the mixtures, the darker of a color the egg turns.
Place the finished eggs into an old egg carton, and allow them to dry.