Book excerpt: 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© FACTORY." "The word Crayola© 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© crayons made for school use. Seventy-five years later Crayola© markers were produced. The Crayola© FACTORY in Easton, Pennsylvania, includes a hands-on discovery center and offers demonstrations that show how crayons and markers are made."