Here's a video of a printer made with those little plastic cubes plus a felt tip marker and a bit of electronics. Neat!
If the above video doesn't work for you, go to http://www.youtube.com/watch?v=zX09WnGU6ZY&feature=player_embedded
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June 7-9, 2013 - Southern California Genealogy Jamboree - Burbank, California
August 17, 2013 - DuPage County Genealogical Society, - Wheaton, Illinois
Sept. 28, 2013 - American-Canadian Genealogical Society, Manchester, New Hampshire
February 6-8, 2014 - RootsTech - Salt Lake City, Utah
February 16, 2014 - Jewish Genealogical Society of Palm Beach County, Florida
March 22, 2014 - Bay County Genealogical Society, Panama City, Florida
June 14, 2014 - Middlesex Society of Genealogists, Middlesex County, Massachusetts