Baked Easter / Ostara Crystals Eggs
These are a hard clay dough that can be painted after you bake it. Then when you break it open, nestled inside is a crystal or small trinket. (Don't try it with plastic.)
You can paint them when done and hide them. Kids just LOVE these Because they get nice little trinkets or gem stones.
Hide the eggs on Ostara, and let your kids crack them open to reveal the Hidden crystals!