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(c) FACTORY." "The word Crayola(c) comes from the French word craie (chalk)...