Luke @ MAKE points us to this neat trick up at Inhabitat:

Design students Jeffrey Gerlach and Andrew Stanley have instituted an informal furniture catch-and-release program. With just a few steps, they have discovered a way to construct a clever and stylish Adirondack chair using Department of Public Works roadblocks that are simple, easy-to-assemble, and instantly returnable to the urban wild.

Great for using the local roadblock to bypass traffic to your lemonade stand.