I wrote some posts about this topic:
http://lesswrong.com/lw/ihs/bed_time_stories_with_clear_concepts/
http://lesswrong.com/r/discussion/lw/iha/raising_numerate_children/
ADDED; You might also look at http://lesswrong.com/user/Gunnar_Zarncke/ for more rational parenting resources.
I wrote some posts about this topic:
http://lesswrong.com/lw/ihs/bed_time_stories_with_clear_concepts/
http://lesswrong.com/r/discussion/lw/iha/raising_numerate_children/
ADDED; You might also look at http://lesswrong.com/user/Gunnar_Zarncke/ for more rational parenting resources.