Website #2 http://www.scsc.k12.in.us/SMS/Teachers/Martin/replacementlink.htm
Website #3 http://www.myschoolhouse.com/courses/O/1/70.asp
Website #4 http://www.cellsalive.com/cells/3dcell.htm
Website #5 http://www.cellsalive.com/gallery.htm
Finished Early? http://www.cellsalive.com/puzzles/index.htm