Summertime is always one of my favourite times for reading (not much beats laying on the beach with a good book). There are many reading lists for kids floating around the internet and I've listed some of them below. Lots of books to choose from!
American Library Association "Notable Children's Books 2009" - an excellent list. Don't forget to check similar lists for every year since 1996.
Caldecott Medal and Honor Books - an annual prize for picture books, lists all winners and Caldecott Honor books since 1938.
Good Comics for Kids summer 2009 reading list - from School Library Journal.
Newbery Medal and Honor Books - an annual prize for children's novels, lists all winners and Newbery Honor books since 1922.
Parkway Summer Reading Lists - great suggested reading lists for grades Primary through 6 from a U.S. school district.
Recommended reading lists from FamilyEducation.com
School Library Journal's Best Books 2008 - a list of very good books published in 2008.
And don't forget that the Cumberland Regional Library is open all summer and hosts activities!