ACT I
Oh The Thinks You Can Think
Boy, Cat, Ensemble
Horton Hears a Who
Cat, Boy, Horton, Jungle Creatures
Biggest Blame Fool
Sour Kangaroo, Young Kangaroo, Horton, Jungle Creatures, Cat
Here on Who
Mr. Mayor, Mrs. Mayor, JoJo, Horton, The Whos
How to Raise a Child
Mr. Mayor, Mrs. Mayor
Oh The Thinks You Can Think (reprise)
Jojo, Cat
It's Possible (Pt. 1)
Jojo, Cat, Fish
It's Possible (Pt. 2
Jojo, Cat, Fish
Alone in the Universe
Horton, Jojo
The One Feather Tail of Miss Gertrude McFuzz" / "Amayzing Mayzie
Gertrude, Mayzie, Bird Girls
Amayzing Gertrude (Pt. 1)
Gertrude, Cat, Bird Girls
Amayzing Gertrude (Pt. 2)
Gertrude, Cat, Bird Girls
Monkey Around" / "Chasing the Whos
The Wickershams, Horton, Sour Kangaroo, Jungle Creatures, Cat, The Whos
Notice Me, Horton
Gertrude, Horton
How Lucky You Are
Mayzie, Cat
Mayzie's Exit" / "Horton Sits on the Egg" / "Dilemma" / "Hunters
Horton, Bird Girls, Cat, Gertrude
How Lucky You Are (Reprise)
Cat
ACT II
Egg, Nest, and Tree
Sour Kangaroo, Horton, Jungle Creatures
Sold" / "Mayzie in Palm Beach
Jungle Creatures, Horton, Mayzie, Cat
Mayzie at the Circus
Mayzie
Amayzing Horton
Mayzie, Horton
Alone in the Universe" (Reprise 1)
Horton
Solla Sollew
Horton, Mr. Mayor, Mrs. Mayor, Jojo, Ensemble
Gertrude/Espionage (Pt. 1)
Gertrude
