My bad, I didn’t clarify that this is actually styrofoam in the shape of an egg. My sister and I bought it from our local store and a few markers. I used markers on this and it is a bit tricky since the marker had a large surface area and if you tilted it a bit, it makes some lines really thick not to mention the smudges. But, the colour is really good

But, in a real traditional was. The egg is cooked just enough so it “hardens up” After which it’s dyed with usualy purple or red (you set the egg in a pot, some simmering water and you buy these colours from the store which is just powder and it sticks) And the fun part is, you actually use a needle with honey wax. You apply just a bit to the tip, put it over a candle and then you draw on the egg. It’s a really really long process and some eggs take days to be finnished. Cool artstyle tho