There are plenty of egg and rabbit related activities out there; the craft kits abound in shops cheaply at this time of year. This is a good opportunity to introduce children to the beliefs of ancient peoples, such as the Saxon goddess Eostre, and the fertility of springtime being the basis behind these rabbit/egg associations at this time of year.
We also like to concentrate on Easter as the Christian Holy Week. I find it helps the children to understand it by looking at the Jewish Passover too; after all, it plays a large part in Christ's story.
Some ideas to get stuck into: