"On the 13th of May, in the jungle of Nool, in the heat of the day in the cool of the pool. He was splashing enjoying the jungles great joys when Horton the Elephant heard a small noise. " I used to read that one to my sister - who's 10 years younger than I - constantly for about two years.
For me, though, I remeber the first "big" book I read when I was ten; "Puppy Lost in Lapland". I remember all the Dr. Seuss books, but the first "young adult" book I ever read on my own is the one that really sticks out.
After that it was The Madeleine L'Engle series, The Dark is Rising, and on and on.
Terinth - ever read "Uncle Shelby's ABC's" ? It's not really for kids, but it cracks me up every time I read it.