This was a MUCH more involved process then I had imagined, and wound up taking up the bulk of the craft time I'd planned on for this unit. We are still going to make a scaled-down version of Aionwahta's wampum belt (as soon as the rest of the wampum we ordered comes in), and this summer we will come up with some sort of finished product from the porcupine quills (which are turning out to be much more difficult to work with than we had anticipated as well), but have decided to push off the cornhusk dolls and turtle shell rattles for the fall, when we'll be needing a couple of Native tribe crafts anyway.
This coming week the boys have "Indian Woods Wisdom" camp at a wonderful nature center to sort of put a hands-on wrap to our unit. Hopefully we can squeeze in a work day or two on our Longhouse and get that finished up, too. And then -- summer break!