Just for fun, my science fiction club made Daleks out of soda cans covered with air-dry clay. Silly me-I didn't realize that as soon as the clay dried around the cans, they would crumble to dust, and I was faced with the sad task of laying 15 student art projects to rest.
As a consolation, I made the kids some more durable replacements out of Sculpey. Here is a photo of my mini-Dalek army. Now, I will have to spend the day listening to my kids yell "Exterminate!"