Tonight we are celebrating a Christian version of the Jewish Passover meal. The Last Supper was a Passover celebration, so there is lots of symbolism, from the lamb to the unleavened bread to the "wine" (sparkling juice).
We follow a script that tells the story of the first Passover and the Jews' release from slavery in Egypt. There is also explanation of how Jesus fulfills and completes the Scriptures. We all participate in the rituals.
We've had this tradition for at least a decade now. Usually we share with other families, but this year is complicated, so we'll have just one or two guests. Many families celebrate the seder on Holy Thursday itself, but I've always found it too hard to share this meal (2 hours plus) AND get to evening mass (Len's schedule often had him working then, too.). As long as we celebrate BEFORE the Mass of the Lord's Supper, I think our family has a chance to renew appreciation of its beauty. The year after year repetition also allows the children's understanding to blossom and grow.
Hopefully I'll take pictures and post more details.