Season 4
Unknown air date
14 Episodes
Episodes
1. Stamps
Unknown air date
Professor Iris is on vacation, so Ms. Principal is teaching the class. Throughout her lesson, she and the class receive letters from the Professor, who asks that all the stamps on the envelopes go to Piano's collection.
2. Learning
Unknown air date
No overview available.
3. Rodents
Unknown air date
No overview available.
4. My Eyes
Unknown air date
No overview available.
5. Hats
Unknown air date
No overview available.
6. Bats
Unknown air date
No overview available.
7. The Moon
Unknown air date
No overview available.
8. My Teeth
Unknown air date
No overview available.
9. Books
Unknown air date
No overview available.
10. Snakes
Unknown air date
No overview available.
11. Taste
Unknown air date
No overview available.
12. Puppets
Unknown air date
No overview available.
13. Balloons
Unknown air date
No overview available.
14. Stringed Instruments
Unknown air date
No overview available.