(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
Contact: Kelly Suarez/ Crayola Experience ... is an art piece in and of itself and 
can be seen from the city's Beachline Expressway.