For the last twenty years, Dutch artist Theo Jansen has been creating strange, wind-propelled creatures he calls Strandbeests, or Beach Animals, out of pvc piping,an extremely common building material in the Netherlands. Technically part of a somewhat esoteric plan by the artist to help maintain Holland's beaches in the face of global climate change and rising ocean levels--I'm a little fuzzy on the details...something about them flinging sand?--I suspect their real function is to be wondrous and uncanny. They do it well!
If you'd like to learn more about the man and his menagerie,there was a great article on Mr. Jansen and his Stranbeests in the New Yorker last month,as well as all sorts of information and arresting imagery available on his website.
Cheers to all the happy beach animals out there!
*UPDATE* Glenda informed me of a TED presentation Mr. Jansen gave a few years ago: