Sir Cumference and the Diameter of Pi

Today (after checking our circles homework), I read the story Sir Cumference and the Diameter of Pi to the kids. It's a funny story that explains (metaphorically) how pi was discovered. You should check it out if you've never heard of it before.

For homework, over the long weekend, I'd like the kids to bring in a circle for Monday's class. I bet you can guess what we're going to do!