this is very simple and easy to do!
A friend showed me how to do this so I'm doing this on his behalf.
Step 1: Preparing the Egg
Step 2: Preparing the Equipment.
Get a glass bowl that can fit the egg in it and still have room around it.
Now, plac the egg into the bowl
Submerge the egg in vinegar, completly covering the whole egg.
Step 3: What Happens?
you can add colour to it by putting the egg in honey, then in food colouring of any colour, making the egg change colour.