This year instead of using a coloring kit from the grocery store, why not use some natural dyes. Here are some ideas. Usually, the more of the natural ingredient you use and the longer the egg soaks (maybe even overnight) the darker the color will be.
Nice project to do together
Details
REMEMBER: Not all of these eggs will be safe to eat. Do not eat eggs that sit in hot water for many hours or overnight. Save those for decorations.
Red:
Save the skins from red onions and boil with the eggs
for 1/2 to 1 hour. Remember the more skins you use and the
longer you soak the darker the color will be. A smaller amount
of skins will produce a nice lavender.
Pink:
Soak your hardboiled eggs in cranberry juice or the juice
from pickled beets.
Violet Blue:
Soak your hardboiled eggs overnight in hot water to which
you have added violet blossoms.
Lavender:
Soak your hardboiled eggs in grape juice, or, add 2 teaspoons
of lemon juice to the Violet Blue water to lighten the color.
Yellow:
To a cup of hot water, add 1 to 1 1/2 teaspoons of tumeric
and 1/2 teaspoon vinegar.
Golden Tan:
Save the skins from yellow onions. Add them to the water when
you hardboil your eggs.
Brown:
To a cup of hot water, add 1 Tablespoon of instant coffee, and
1/2 teaspoon vinegar.
Green:
Add 1/4 teaspoon of baking soda to a bowl of the water from
Violet Blue before soaking your eggs. You can also soak your eggs
in liquid chlorophyll. (Buy it at the pet store or drug store.)
Pretty Pastels: You can rub blueberries and cranberries right on the shells for
soft blues and pink. Blend them for another pretty result.