Lulu tells Alvin about when the poor little girl sold vacuum cleaners to Hazel and her friends.; Alvin is pretending to be a dog when he and Lulu go shopping.; Lulu is all dressed up for her first piano lesson with Miss Trebble.; Mr. McNabbem is taken on the school outing against his will.; Tubby goes to the Sunset Diner and eats a whole meal with each group of customers that come in.; Lulu and Annie trick Tubby into not going on their picnic with them.