Pour each packet of Kool-Aid powder into a small bowl or container.
Add ½ cup of water to each bowl and stir for a few seconds, until the powder is completely dissolved.
Gently drop a hard boiled egg into each bowl and let the eggs soak in Kool-Aid for about 5-10 minutes.
Use a spoon to gently remove each egg from the Kool-Aid and set it down to dry on a non-porous surface like a ceramic plate or metal drying rack. To prevent smearing, do not touch the eggs with your fingers and make sure to place different-colored eggs far enough apart that they won't come into contact while they're drying.
Once the eggs are completely dry to the touch, they're ready to be used however you like!