ACT I
Oh The Thinks You Can Think
The Cat, Jojo, Horton, Gertrude, Mr. Mayor, Mrs. Mayor, Sour Kangaroo, Young Kangaroo, Mayzie, Ensemble
Horton Hears a Who
The Cat, Horton, Jojo, Bird Girls, Jungle Creatures
Biggest Blame Fool
Sour Kangaroo, Young Kangaroo, Horton, Wickersham Sisters, Bird Girls, Jungle Creatures, Gertrude, Mayzie, The Cat
"Gertrude McFuzz"
Gertrude
Here on Who
Mr. Mayor, Mrs. Mayor, JoJo, Horton, The Whos, The Grinch
How to Raise a Child
Mr. Mayor, Mrs. Mayor
Oh The Thinks You Can Think (reprise)
Jojo, The Cat
It's Possible (Pt. 1)
Jojo, The Cat
It's Possible (Pt. 2)
Jojo, The Cat
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, The Cat, Bird Girls
"Amayzing Gertrude (Pt. 2)"
Gertrude, The Cat, Bird Girls
"Monkey Around" / "Chasing The Whos"
Sour Kangaroo, Young Kangaroo, Bird Girls, Wickershams, Vlad Vladikoff
Notice Me, Horton
Gertrude, Horton
How Lucky You Are
Mayzie, The Cat
Mayzie's Exit" / "Horton Sits on the Egg" / "Dilemma" / "Hunters
Horton, Gertrude, Bird Girls
ACT II
Egg, Nest, and Tree
Sour Kangaroo, Young Kangaroo, Horton, Hunters, Bird Girls
Sold" / "Mayzie in Palm Beach
Sour Kangaroo, Young Kangaroo, Horton, Bird Girls, Mayzie, The Cat
