Froggy hoped for a brother to play with so he is disappointed with his new baby sister, Pollywogilina, but only until she is old enough to start learning from her big brother.

Froggy's marching band practices for their debut at the Apple Blossom Parade, hoping to win the big prize.

Horrible Harry falls in love with Song Lee, and Harry's best friend, Doug, can't stand all that mush.

Inspired by his third-grade class's study of the moon, Harry announces that he is going there.

When Horrible Harry's pet cat, Googer, sneaks a ride and gets into the school building, third-graders Harry and Doug have to catch him before anyone else does, which means going into some forbidden places.

It's almost summer vacation and the students in room 2B are having trouble concentrating on their butterfly project, until a frightening-looking new teacher comes to supervise the Suspension Room and Harry is sent there as punishment for unruly behavior.

As he helps his father prepare to celebrate his mother's birthday, Froggy makes a big mess trying to do things his own way.

"It's Froggy's birthday, but no one has remembered. His parents don't seem to realize it's his special day, and none of his friends are at home to wish him a happy birthday. Will Froggy celebrate his birthday all alone? Has everyone really forgotten?"--

Horrible Harry, the class clown of Room 2B, returns to the spotlight with the Purple People, mysterious beings that only he can see.

Miss Mackle's third graders share December holiday traditions --Christmas, Hanukkah, Kwanzaa, Three Kings Day, and Korean New Year-- with each other and with Harry's great grandfather, who has just moved to a nursing home.