Frank Lloyd Wright's Falling Water, Gettysburg, Ben Franklin's inventions, the Liberty Bell -- there is so much to learn about Pennsylvania's history and geography. K is for Keystone is a wonderful introduction to many of Pennsylvania's unique features for readers young and old. "E is for Easton A town where you can see, The birthplace of crayons and markers, In the  Crayola:copyright: FACTORY  ." "The word  Crayola:copyright: comes from the French word craie (chalk) and the first part of the word oleaginous (an oily paraffin wax). In 1903 cousins Edwin Binney and C. Harold Smith created an overnight success with their  Crayola:copyright: crayons made for school use. Seventy-five years later  Crayola:copyright: markers were produced. The  Crayola:copyright: FACTORY  in Easton, Pennsylvania, includes a hands-on discovery center and offers demonstrations that show how crayons and markers are made."