I came across these eggs and thought they look so cool, how could you not want to try to make these?
Picture borrowed from Char at Crap I've made
You can find the complete tutorial HERE on how to make them. And trust me, it's alot easier than it looks. (Though you probably can't do it with younger kids).
Just wait until you find out what she used to make the swirly pattern on them, you won't believe it! I know I never would have thought of using that on an egg, but the results sure are vibrant!