Kindergarten: Pete's a Pizza by William Steig. This is one of my all time favourite books in the world. I turned my own son into a pizza this way recently and it was so fun!
Grade 1-3: The Most Amazing Dinosaur by James Stevenson. A destitute rat helps to save the day for his new friends that had taken him in at their museum.
and Miss Fanny's Hat by Jan Karon. A hat becomes something altogether different in this thought provoking and inspiring story of sharing and selflessness.
Grade 4: --
Grade 5: Part 2 of The Seven Chinese Brothers by Margaret Mahy and The Legend of the Indian Paintbrush by Tomie De Paola.