I purchased these a few years ago. The idea is to read this book called Benjamin's Box and open the eggs as you follow along. The book is about a boy who follows Jesus from Him coming into the city on a donkey to after His resurrection. The boy picks up things such as a piece of leather from the whips that beat Jesus, a piece of the rock from the stone covering the tomb, until you get to the last egg and its empty. I think I purchased this at a Christian bookstore.