I Wish That I Had Duckfeet by Dr. Seuss
Pinkalicious by Victoria and Elizabeth Kann
Bob Books by Bobby Lynn Maslen
The Giving Tree by Shel Silverstein
Henry's Awful Mistake by Robert Quakenbush
Olivia and all of the related books, especially Olivia Helps With Christmas by Ian Falconer
One Fish Two Fish Red Fish Blue Fish by Dr. Seuss
For a brief explanation of each book and links to find out more about them you can read this article: Favorite Children's Books.