Frustrated because the rules for her class's Pet Day will not let her take her dog to school, Junie B. Jones considers taking a raccoon, a worm, a dead fish, and other unusual replacements.
Junie B is very upset when a boy in her class plans to invite everyone except her to his birthday party, but her grandfather helps her deal with the situation.
Unable to compete with her friends' fancy clothes and running ability, irrepressible six-year-old Junie B. finds her own way to make the new boy at school like her.
Junie, a spunky, sometimes exasperating, kindergartener, looks forward to winning lots of prizes at the school carnival, but a fruit cake was not exactly what she had in mind.
With Halloween approaching, Junie B. needs to find a costume that will scare off the real witches and ghosts that she believes will be out on the holiday.
To celebrate the Thanksgiving holiday, Mr. Scary's first grade class prepares a Thankful List for the school contest, but Junie B. Jones finds it hard to be grateful for squash or Tattletale May.
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.
Through a misunderstanding, Junie B. thinks that her new baby brother is really a baby monkey, and her report of this news creates excitement and trouble in her kindergarten class.