Oh, gosh, I have so many it's hard to choose just one all time favorite. My new favorite is Grandaddy & Jannetta. I'll have to go find it for the author. From my childhood, I remember Katy No Pockets by HA Rey. I was so excited to see it in our 2nd grade basal a few years ago! Also, all the Amelia Bedelia books by Peggy Parish.