Some I found at Larry Ferrazzo's blog.
Put cartoon strips in order and answer comprehension questions. (Great!)
http://www.woodlands-junior.kent.sch.uk/interactive/onlinestory.htm#talk a collection of online reading stories.
http://www.harcourtschool.com/activity/book_buddy/gr1_4lily/skill_ae.htmlDrawing conclusions. (simple but interesting)
http://www.studyzone.org/testprep/ela4/i/enviroprintp.cfm Reading Street signs
http://www.britishcouncil.org/kids-stories.htm stories for kids
http://www.englishclub.com/reading/short-stories.htm short stories graded by level.
http://www.zapdramatic.com/mod1.htm You can read, listen and watch a very exciting story. You are even asked to interact with the events. SUPERB!