June Foray credited as playing...
Jane Kangaroo • Mother Who • Baby Who • Cindy Lou Who
- Tho Whos: [singing] The world is a-sittin' on an elephant's nose.
- Female Who: An elephant's what?
- Washer Who: An elephant's nose.
- Cindy Lou Who: What's an elephant?
- Mother Who: Is Horton an elephant?
- Baby Who: No, ma'am, Horton's a pickle.
- Other Baby Who: What's a Horton?
- Horton: [after attempting to get the Whos to make themselves heard, which fails] Uh, you should've heard *that*, just as clear as a bell. / Everything is going to be... perfectly swell.
- Jane Kangaroo: Hmph, I heard nothing, and *you* didn't either, / And as for my prodigy, *he* didn't...
- Junior Kangaroo: ...Neither!
- Jane Kangaroo: Hmph!
- Narrator: It was Jane Kangaroo, and the small kangaroo in her pouch said:
- Junior Kangaroo: Hmph, too!