At that age, Geronimo Stilton is a fun read (as someone already mentioned). So is the Capital Mysteries series by Ron Roy (some kids also like the A to Z Mysteries by the same author). Ruth Gannett Stiles' Dragon books are good. And, the Andrew Lost series by JC Greenburg is good and includes a bit of science too. Also, my kids have enjoyed anything by Kate DiCamillo (from the Mercy Watson easy readers to Because of Winn-Dixie to Tale of Despereaux). HTH