Recently I was thinking about the value of Christmas or Christmas Eve services for children. Christianity has a natural appeal or connection to children that's lacking in Islam or rabbinical Judaism because God became a child. When children sing Christmas carols, they can personally relate to those carols, because God personally related to their situation by becoming a child and passing through the stages of maturation. In the Incarnation, God relates to humans at our own level, and not just in a generic sense, but from infancy through adulthood.
At the other end of the lifecycle, we can relate to Jesus in part because he shared in the experience of human mortality. Once again, Islam and rabbinical Judaism lack that vital connection.
Likewise, Easter speaks to the elderly, as well as those who lose loved ones through death. It carries the hope of restoration and reunion in the face of the grave.