What about an Activity (maybe branching from Physics) that would allow children to build their own virtual Rube Goldberg machines? I would be happy to help. Gerald <div class="gmail_quote">2012/1/8 Walter Bender <<a href="mailto:walter.bender@gmail.com">walter.bender@gmail.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><a href="http://www.nytimes.com/2012/01/08/nyregion/brooklyns-joseph-herscher-and-his-rube-goldberg-machines.html" target="_blank">http://www.nytimes.com/2012/01/08/nyregion/brooklyns-joseph-herscher-and-his-rube-goldberg-machines.html</a> -walter -- Walter Bender Sugar Labs <a href="http://www.sugarlabs.org" target="_blank">http://www.sugarlabs.org</a> _______________________________________________ IAEP -- It's An Education Project (not a laptop project!) <a href="mailto:IAEP@lists.sugarlabs.org">IAEP@lists.sugarlabs.org</a> <a href="http://lists.sugarlabs.org/listinfo/iaep" target="_blank">http://lists.sugarlabs.org/listinfo/iaep</a> </blockquote></div>