If you want to keep your decorated eggs it is best to use blown eggs. However, blown eggs are much more fragile and harder for young kids to handle. To make a blown egg poke a small hole in each end of the egg with a large needle. Push needle into egg and twist around to break yoke. Hold the egg over a bowl and blow hard through th hole until the shell is empty.
Rinse eggshells well and allow to dry.
Bring to a boil and simmer until water turns color you like. Remove from heat and strain reserving water. When water is cool add boiled or blown eggs. Let sit until they turn the desired color. Remove with slotted spoon and allow to dry.