I read the books in this series to my son (5) and daughter (3) and they both love all of them, but my son is happy that there are books about Almanzo and not just the girls. Highly recommended for both boys and girls :)
I began buying this set of books for my daughter when she was two years old. She is now six and we have eight of the books, but County Fair is her favorite by far. There is something about the big, beautiful pictures and simple story that appeals to her. She likes the books about Laura and Mary too, but this one about Almanzo is the one she always comes back to.