Sometimes gross things are just fun.
Distilled white vinegar
A jar large enough to fit the egg
Optional: Food coloring
# Place the egg in the jar and fill the jar with vinegar until it is completely covered.
# If you prefer a colorful egg, add a few drops of food coloring. Close the jar lid tightly.
# Wait for 24 hours.
# Remove the egg from the vinegar and gently rub the shell off in water. If it doesn't come off smoothly, you will need to soak it more.