A model of Theo Jansen's "Rigide Ancora — 1995" Strandbeest walking. His clever design has gotten lots of interest from artists, mathematicians, and NASA.
His website, www.strandbeest.com shows the evolution of his various types. He has done a TED talk where he explains his mechanical - digital logic that allows his beasts to make choices such as avoiding deep water.
Video of how to assemble the model:
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