My grandmother made onion skin eggs. Onion Dyed Eggs -popular in Poland (add onion skins to water while boiling the eggs. Designs are made with a wax pencil before boiling or can be hand painted after)
using blueberries to dye your Easter eggs. Simply juice some blueberries, dip your hard boiled eggs into the liquid, and voila! Another alternative to dye is Kool-Aid packets, the colors will turn out a lot brighter.