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The strandbeest Since 1990, Jansen has been creating strandbeesten (Dutch for "beach animals", singular strandbeest), which are moving kinetic structures, sometimes wind-propelled, that resemble walking animals, described by Jansen as artificial life.

The purpose of strandbeests is to move sand back up onto the nearby dunes to help preserve them from erosion by the rising sea.

While the Strandbeests has evolved as a species over the years, becoming more sophisticated each time, their 'bone structure' remains relatively unchanged. Each animal's central spine is a wind-powered crankshaft that moves the many legs, each made of 12 small rods that create an eerily lifelike walking movement..

The PET bottles are a type of wind stomach for the animals. The wind is stored with the help of the wings. The wings on the back of the beast wave in the wind, they are connected to a crankshaft, on the crankshaft are pumps that pump air into the PET bottles to high pressure.

His name for his animals is Strandbeests, which means “beach animals” in Dutch.

Passage Summary: “Coast Beast” describes the “strandbeests,” kinetic sculptures built by Theo Jansen using art and science. The passage explains the purpose of the structures, how Jansen made them, and how early failures helped Jansen improve his design.