tin cans, various hardware
This step by step instructional to build Robot Recipes: Pumpkin Pi Bots appeared on the Make: blog
"After you’ve had your pumpkin pie this Thanksgiving, why not make some metal toy robots from the left over cans. In the following project you’ll learn how to mockup, assemble, and embellish your robot designs. The bots are durable enough to give to the kids or perfect for your next electronics project enclosure. So grab a drill and a turkey sandwich, because this is one great Black Friday project."