For each color or packet of Kool-Aid, add ½ cup boiling water, 1 teaspoon vinegar, and one packet of Kool-Aid to a cup and stir until the Kool-Aid is dissolved.
Softly add your eggs to the dye of your choice (one egg to a cup is ideal) and let sit for 1-2 minutes or until you like the color consistency.
Using a spoon, gently remove the egg from the cup and place on a paper towel.
Allow to sit undisturbed for about 5 minutes or until no longer wet before placing it back in the egg carton.