CRAYOLA: A COLORFUL HISTORY
'(<a href="http://www.j-archive.com/media/2008-10-28_DJ_25.wmv">Kelly of the Clue Crew stands with a melting tray at the Crayola Museum & Factory in Easton, PA.</a>)  The makers of Crayola introduced <a href="http://www.j-archive.com/media/2008-10-28_DJ_25a.jpg" target="_blank">dust-free school chalk</a>; it was so successful that it won a gold medal at the 1904 World Exposition in this city'
St. Louis