A number of these Lego train clubs exhibit large model train layouts at various community functions, train shows, and Lego conventions, such as BrickFest. Some of the largest layouts in the United States have been the result of ILTCO's (International Lego Train Club Organization) lead combined efforts by several train clubs at the 2005, 2006, and 2007 National Model Railroad Association national conventions. Lego has also introduced train sets designed by members of the Lego community, for example, Santa Fe set by James Mathis, and the Train Factory set in March 2007.