Gus plans to make his mom a special Mother's Day gift during art time at school, but things do not turn out exactly as planned.

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.

When Sidney kills Harry's pet spider, Harry wants revenge. And what better place to get it than on the class trip to a creepy old prison and copper mine.

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

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

Horrible Harry of classroom 2B cuts back on his mischievous pranks after falling for Song Lee.

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.

Froggy isn't looking forward to his check-up because he might get a shot but when it's over and he's pronounced a very healthy frog, Dr. Mugwort is the one who dreads Froggy's next visit.

As Valentine's Day approaches, the students in Room 2B are preoccupied with kickball and a possible wedding between Horrible Harry and Song Lee.

When their teacher ends up in the hospital, the members of class 2B find a way to include her in their holiday celebration.