We have read and enjoyed Homer Price, Little House series, E.B. White books, an abridged version of Wind in the Willows. We also read Carry on Mr. Bowditch but that is a little bit older. Mary Poppins, The Moffats, The Saturdays, The Little Prince, Mrs. Piggle Wiggle.
This website has 1000 books that are listed by grades. You can look there for suggestion.
http://www.classical-homeschooling.org/celoop/1000.html