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