Lulu disguises herself as a boy to try to keep the boys from playing hooky.; Lulu tells Alvin about the little girl who lost her shadow.; Tubby's model airplane flies out the window and into a counterfeiters' apartment.; Lulu's pop pays Lulu to try to get Alvin to break his noisy record.; Lulu wears her mother's new hat outside and Wilbur's dog eats it.; Lulu thinks she has hypnotized Tubby into giving her an ice cream cone.