The Association for Library Service to Children (ALSC), a division of the American Library Association, has a Great Websites page, a terrific starting point for looking for good resources and things to feature.  The 2012 Great Web Sites Committee added 28 new selections, which can be found at http://gws.ala.org.

“Great Web Sites for Kids are those considered the best web sites for children ages birth to 14, outstanding in both content and conception. As applied to web sites for young people, “great” should be thought to include sites of especially commendable quality, sites that reflect and encourage young people’s interests in exemplary ways. Our selection criteria can be found at:  http://www.ala.org/alsc/greatwebsites/greatwebsitesforkids/greatwebsites.”