In my work with preschoolers, I find many of them like to lead the group when given the chance.  There is no way to know if any will become conductors of musical groups.  Those of us who are under a conductors leadership have most likely experienced many personalities on the podium.  Why do the conduct?  A 2009 research project provides some insights which are highlighted the the following article:

http://www.miller-mccune.com/culture-society/sharing-intense-emotions-motivates-maestros-3575/