"Origami Garbage Bin" - includes animation (and a diagram) to show you how to fold this. Although it's called a garbage bin, it will make great seed-starting pots since you can place the entire thing in the ground and the newspaper will quickly decompose.
Recycled Greenhouse: this greenhouse is made from the windows of an old dairy farm. Virtually all the materials are recycled, save for the galvanized screws that hold it all together. It provides the perfect greenhouse for budding annuals.