Exploratorium

=The San Francisco Exploratorium []=



Marble Machines
===A marble machine is a creative contraption, made from materials found at local hardware stores, and designed to send a rolling marble on a trip through tubes and funnels, across tracks and bumpers, and into a catch at the end. “We like it because you can use reuse the materials in lots of ways, thinking is made visible through each construction, and no two Marble Machines look alike,” says Mike Petrich, curator of the South Gallery.===