(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
[DOC] [TLE] Crayola - Wikipedia [PAR] Crayola is a brand of artists' supplies manufactured by Crayola, LLC and best 
known for its crayons.