A great website for alphabet and beginning reading practice. http://www.starfall.com/
National Geographic for Kids http://www.nationalgeographic.com/kids/
White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
Play games and learn basic computer skills with your favorite characters at PBSkids.org http://pbskids.org/
Play games and learn basic computer skills with your favorite characters at NickJr.com http://www.nickjr.com/