Harry persuades his classmates to sneak through the playground fence during lunchtime recess to view some unusual mushrooms.

Horrible Harry must defend his reputation as a detective by cracking the secret code of Mrs. Funderburke's lunch prizes.

Horrible Harry and friends start off third grade with a new room and a field trip to an old copper mine to study rocks.

When Froggy, Mom, and Pollywogilina set out for the library, Froggy brings a wheelbarrow to hold all the books he plans to borrow but he is so excited that he forgets to use his indoor voice.

When Sid, his annoying third-grade classmate, ruins Song Lee's origami praying mantis, Horrible Harry plots triple revenge on the troublemaker.

As Valentine's Day approaches, Froggy thinks that he is falling in love with the new girl in class, but his feelings change when she gives him their first kiss.

On a class trip to the pumpkin patch, Froggy exuberantly picks a pumpkin in hopes of carving a jack-o'-lantern, making a pumpkin pie, and possibly winning a prize in his classs pumpkin-picking contest.

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

"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?"--

Froggy is afraid of the water until his mother, along with his flippers, snorkle, and mask, help him learn to swim.