This is a really colorful craft idea for a collage using dyed eggshells. It's also a good way to recycle all those eggs. It'd be a good idea to make the dyed eggshells far in advance and keep a stock of them on hand for various crafts.
Easter egg dyes or food coloring
vinegar or lemon juice
Rinse and allow egg shells to dry after cooking. Be sure to remove the inner membrane.
Put into a ziplock bag and break into small pieces. Don't pulverize them.
Place water and food coloring into small cups. Pour in the eggshells. Adding a little vinegar or lemon juice will create a stronger color. Remove and allow to dry. Separate your various colors.
Draw a design on paper with glue.
Cover with eggshells and pour off the excess.
Draw a design with crayons and put glue on the inside decorate.