This stuff would be really easy to make. I have been wanting to make some for a while but want to figure out a way to make them a bit modular first. Hmmmmm... Maybe I will make a few this week and we can come up with some quick ways to make them for $.50 or something.
I need to find some corrugated material alternative though. I like the paper crimper idea but they are so expensive! I haven't been able to just find corrugated card yet.