At Berkeley, they’re coming up with new methods to make their itty bitty hexapods. These are generally small flatpacked bodies cut from cardboard. The end goal is to not only make them smaller as well as quicker to build, however to minimize the friction in the joints. You can download the data on their site in addition to download motion pictures of them in action. For a larger as well as somewhat less challenging flatpacked robot, inspect out the flatpacked 2 motor walker.
[thanks Thuli]