Star Fall is a sight to help build reading skills http://www.starfall.com
Fun Brain has a variety of educational games for kids of all grade levels. http://www.funbrain.com
Brain Pop Jr has some educational videos suitable for kindergarten. http://www.brainpopjr.com
Little fingers is a great place that kids love! Just click on games. http://www.littlefingers.com
Count Us In- is a site designed to help kids understand numbers. http://www.abc.net.au/countusin/