A good site for practicing letters, letter sounds, building words and more. http://www.literacycenter.net/lessonview_en.htm#
Check out the interesting letter creatures on this site- they are cool! http://www.bemboszoo.com/Bembo.swf
A good site for kids who love Clifford Stories. The kids can play a variety of games. The interactive story books are great for early readers. http://teacher.scholastic.com/clifford1/flash/story_4.htm
This is a good site for developing reading skills. http://www.starfall.com/
This site is all about Ezra Jack Keats' books. It has a kids corner, which is currently under construction. http://www.ezra-jack-keats.org/home/index.html
This site features a variety of word puzzles, games, and simple math activities that are related to a specific book or familiar character. http://www.scholastic.com/learningarcade/play.htm