Iris, The Happy Professor Season 3, Episode 19: I'm Scared

Space

Skeleton boards a rocket for a journey to the moon and the outer planets.

Musical Instruments

Ms. Principal coaxes everyone to form a band for an upcoming competition.

Snow

The classroom window id not closed, allowing a snow drift to clutter everything. It doesn't stop Professor Iris and the class from their lesson on snow.

Fish

Ms. Principal brings a goldfish to the classroom. Iris and the class try to cheer it up.

Dancing

Professor Iris is in a dancing mood, and so is Ms. Principal. Only Skeleton seems to go against the flow.

Cats

Wind

Presussion Instruments

I Feel Sick

Olympic Games

Castles

Ms. Principal appears to be trapped in a castle turret, and it's up to Professor Iris and his class to try and rescue her.

Water

When I Grow Up

Cold Places

Rivers

Shoes

Friendship

Dinosaurs

Games

Dreams

I Can Count

Hot Places

The school's heating system has broken down, forcing everyone to bundle up. On top of that, Ms. Principal has a cold. Professor Iris whisks here to his magic chalkboard to experience the desert.

Turtles

Skeleton can't fathom that a turtle could beat a hare in a race. Professor Iris whisks the entire class into the turtle's environment, where a turtle races Skeleton dressed as a hare.

Garbage

Skeleton's ""little snack"" grew to four times what he really ate and about eight times the amount of garbage he thought he'd produce. With the classroom a mess, Professor Iris puts Skeleton on the job as a garbage collector.

Boats

Ms. Principal has found what appears to be a treasure map. Thus Skeleton and Plant board a boat, where Professor Iris holds his lesson.