Although a classmate says that she cannot play Peter Pan in the school play because she is African-American, Grace discovers that she can do anything she sets her mind to do.
Jos? is reluctant to take part in a production of "Mary Had a Little Lamb," but the confidence of his teacher, the team spirit of his classmates, and the response of the audience--including his proud mother--change his attitude.
As tryouts for the school musical begin, Babymouse takes the starring role in several imaginary Broadway productions, which also feature her debonair new classmate, Henry the hedgehog.
For their second-grade class celebration of Kwanzaa, Chanukah, Christmas and all other winter holidays, Gloria and Big Bob write a play about Potato Claus, friend to children everywhere.
When Cousin Henry gets all the attention in the grown-up musical in which they have roles, Angelina becomes jealous, but she demonstrates her fondness for him when a crisis occurs on opening night.
Watchmaker-mouse Hermux Tantamoq enters the exciting and somewhat shady world of show business to investigate a mysterious blackmailer at the Varmint Theater.
Junie B.'s journal entries start with Room One's stomach virus excitement, the first-grade Columbus Day play, and getting the part of the Pinta, the fastest ship.