One simple activity you can do with Easter Eggs is to make a sound matching game.
1) Fill pairs of eggs with items to make different sounds (beans, sugar, jingle bells, screws, peanuts, pom-poms, etc.). Eight to ten eggs seems to work well.
2) Place in a basket and allow your child to shake each egg. See if she can make some matches!! Please make sure you supervise so no little pieces are swallowed!
I had my eggs filled with peanuts, gum-drops, a small piece of a pretzel, and pom-poms — so we had a little snack afterwards (excluding pom-poms, of course!).