So here is what I ended up doing. Square layers on top of rectangular layers with a pocket on the back that held a forever cascading set of extra enclosures. Surrounding the text of the invite, was a quote in both English and Hebrew. One that graces the Bimah in our synagogue and really captured how we felt on this occasion. Because we had two separate parties, a afternoon luncheon for family and adults, and a kids party for my son's friends at night, there were many enclosures in the back pocket. So in all, besides the five layer invite, there were two reception cards, two hand drawn maps, and two different response cards. Plus, I custom die cut the envelopes out of the "recycled" paper with a layered return address card attached.
And there were Thank you notes. And the letterpress journals that we handed out with a cityscape design on them to coordinate with the sweatshirts and sign in board for the Skyscraper exhibit at the Liberty Science Center where we had the kids' party.