Here are some pictures of Easter egg decorating ideas. They did not give a tutorial but look easy to figure out. Anyway, you can look at these pictures and create your own.
Photo credit: Wish on a Whisker
Photo credit: Rafał Wójcik
Photo credit: DyeDye
Photo credit: dotcomwomen
Here is the link: http://blog.luulla.com/handmade/10-easter-eggs-decorating-ideas