So, I'd already finished my 1000 paper cranes and was waiting for a chance to find a hunking big branch to hang them from, when I realized that I actually had more cranes and a small branch already lying around. I had already perfected my crane-stringing technique and decided to make a quick mobile for my friend's birthday:
I used plain thread to string the cranes, spacing them with beads, sequins, and the odd button or two. I then broke the branch in half, wrapped copper wire around it, and hung the four strings with copper wire off the crossed branches.
Sorry for the blurry, dim picture, but I gave it to my friend the night I made it.