Activities for kids:
word sort - excellent practice
www.starfall.com - free reading activities
www.raz-kids.com - multiple reading levels, interactive comprehension quizes.
www.primarygames.com - lots of advertisements, but built by a teacher and appropriate for all kinds of fun learning in several subjcts.
http://www.greece.k12.ny.us/summerread/list/elementary.htm#authors - find books annotated with grade levels and category.
http://www.readingrockets.org/books/booksbytheme - for children 0 – 9.
http://school.familyeducation.com/summer/reading/36091.html - excellent listing by grade level and interest.
Articles about Reading:
http://www.rif.org/parents/tips/ - why you should read aloud to your child at any level