Ooooh, books.
Another vote for:
The Boxcar Children
Nancy Drew
Bobbsey Twins
Little House on the Prairie
The Wizard of Oz
American Girls (Samantha was my favorite)
My Side of the Mountain
Cricket in Times Square
Also:
I love, Louisa May Alcott Little Women and Eight Cousins
Anne of Green Gables (may be better at age 9-11) -L.M. Montgomery
The Chronicles of Narnia -C.S. Lewis
Mr. Popper's Penguins
I can still picture where each of these books sat on the library shelves. I read so much, that there was no way to buy all of the books that I wanted.