(Kelly of the Clue Crew stands with a melting tray at the Crayola Museum & Factory in Easton, PA.)  The makers of Crayola introduced dust-free school chalk; it was so successful that it won a gold medal at the 1904 World Exposition in this city
... 1904 - The company wins a gold Medal at the 1904 St. Louis 
World... [DOC] [TLE] Crayola Experience grand Opening | crayola.com [PAR] Jul 1, 2015 ...