For students interested in civil engineering, this site will be very interesting.  Building a skyscraper requires attention to many different forces.  Of particular focus is whether the skyscraper can withstand lateral shaking from an earthquake.  Not only can users read about skyscrapers, but they can also make their own shaking table to test skyscrapers built from LEGOS.  The experimental procedure is clear and suggestions are made for varying the experiments.

courtesy of netTrekker