I love this stuff. Always have. Here's a tip for those of you new to corrugated ribbing. If you hold one color in each hand, put the color you purl with in your left hand. This will make it very easy to move the purl color from the back to the front.
Tomorrow morning, I'm taking my spinning wheel in to show the kindergarteners how I make yarn. Should be interesting. I wish I owned a copy of Charlie Needs a New Cloak. Maybe I can find one in the school library in the morning. I think I'll bring the drop spindle, too, and try to impress upon them just how laborious a process spinning has been through so much of human history.