Arthur, For the Very First Time by Patricia MacLachlan

Arthur Rasby is ten years old and having the worst summer of his life. His parents don't listen to him, so he writes everything down -- everything that's real -- in his journal. But when he goes to stay with his Great-Aunt Elda and Great-Uncle Wrisby on their farm, his world is turned upside down. For the first time Arthur wonders what's real and what's not.

His aunt and uncle do things Arthur's parents would never do -- like climbing out windows to sit in trees, singing to their pet pig, and speaking French to a pet chicken. Life on the farm happens much too fast to write down -- sometimes wonderful, sometimes terrible. Arthur begins to understand there is more than one way of seeing and doing and loving. And he realizes there's a whole world just waiting to be discovered.