What you need:
Yarn of choice-it doesn't require much so you could just buy one if you wont want a variety or spend a ton of money
Elmer's glue: I just bought two large bottles and one used one for 8 eggs.
A package of balloons-the amount depends how many eggs you want to make.
foil or freezer paper-I didn't realize that I was out of freezer paper so I impervised and used foil.
So now you wait for a good 24 hours to dry. Once it had dried you pop the balloon and clean off all the glue.