So after reading a bunch of UF stuff last night, I had a dream. In it, Corwin was camping with someone I couldn't remember, and he had had an unfolding cottage with him.

It was basically a sheet of metal that was powered by a crystal that expanded when heated, and various mechanical linkages caused durasteel panels to unfold at the proper time to form a tiny but sturdy cottage.

The person he was camping with expressed her surprise that it didn't use any kind of electronics. He, however, praised its primitive sophistication, and explained that while an electronic solution would be finicky at best, this thing you'd practically have to snap in half or rust to ruin to get it to not work.