Tips for interfaith families: How to make a seder inclusive
Unlike most Jewish holidays, Passover is observed primarily in the home. And the Passover seder, or ritual meal that marks the start of the festival, is that Jewish holiday with the highest participation rate. An important Jewish value is to invite strangers to the seder which celebrates freedom. These nine guidelines are designed to enable non-Jews and interfaith families to feel more comfortable with the holiday’s rituals and traditions.
http://www.interfaithfamily.com/files/pdf/SedarTips2006.pdf