With a long, long history, KOG is a major player in the art glass industry worldwide. Familiarly, they provided the glass for Cinderella's Castle at Disney World and the North Pole Tower in the movie, The Santa Clause. They are providers of glass tiles that line the platforms of the Washington DC Metro, and other projects in many countries. They make glass sheets as well as hot glass projects and stained glass creation and restoration. It was a busy place, both in the factory, and in the Op Shop where many visitors shop for gifts as well as supplies for art projects.