ACT I
Oh, the Thinks You Can Think!
Cat, Jojo, Horton, Mr. & Mrs. Mayor, Gertrude, Mayzie, Sour Kangaroo, Schmitz, Company
Horton Hears a Who
Horton, Bird Girls, Wickershams, Mayzie, Gertrude, Sour Kangaroo, Young Roo, Jungle Citizen
Biggest Blame Fool
Sour Kangaroo, Young Roo, Horton, Wickershams, Bird Girls, Cat, Gertrude, Mayzie, Jungle Citizen, Jojo
Here On Who
Mr. & Mrs. Mayor, Cindy Lou, Grinch, Whos, Horton, Max, Lorax
Oh, the Thinks You Can Think Reprise
Cat, Jojo
It's Possible
Jojo, Cat, Fish, Mr. & Mrs. Mayor
How to Raise a Child
Mr. & Mrs. Mayor, Cat
The Military
Schmitz, Cadets, Jojo, Mr. & Mrs. Mayor
Alone in the Universe
Horton, Jojo
One Feather Tail of Ms. Gertrude McFuzz
Gertrude
Amayzing Mayzie
Mayzie, Gertrude, Bird Girls
Amayzing Gertrude
Gertrude, Bird Girls, Mayzie, Cat
Monkey Around
Wickershams
Chasing the Whos
Sour Kangaroo, Young Roo, Bird Girls, Wickershams, Cat, Horton, Vlad Vladikoff, Mr. & Mrs. Mayor, Cindy Lou, Jojo, Whos, Jungle Citizen
How Lucky You Are
Cat, Mr. & Mrs. Mayor, Cindy Lou, Jojo, Whos, Max
Notice Me, Horton
Gertrude, Horton
How Lucky You Are (Mayzie's Reprise)
Mayzie, Cat
Horton Sits On The Egg/ Act 1 Finale
Horton, Gertrude, Cat, Jojo, Whos, Bird Girls, Company
