Nothing. Many nominal christians have tried to make it into a secular holiday (holy day), kinda like a spring celebration.
Christmas has been denigrated the same way.
How else do you keep the kids busy before Easter dinner with the extended family, than having an Easter egg hunt? And the kids really clean up with those eggs -- they're filled with quarters and dollar bills, not just with candy.
Bunnies and eggs as symbols of spring are used by the candy industry to push their products on us. It's as good a reason as any to eat chocolate.
Bonnets? Kids don't wear them anymore. I remember as a kid in the 50's wearing a new dress in a pastel color, a new hat, patent leather shoes and white gloves to church on Easter Sunday.