The NSA logo used to be surrounded by a cypher wheel like that. That reappeared as NSA's Xmas ornament for 1998.[1]<p>[1] <a href="http://www.keiththomsonbooks.com/nsa-ornament" rel="nofollow">http://www.keiththomsonbooks.com/nsa-ornament</a>
A wonderful story from a time when reality and kid's imagination were seemingly much closer than they are now.<p>Does anyone have good examples of similar games for kids that involve interesting, tangible science with real-world implications that are simultaneously a collective thing?