Phineas: I know what we're gonna do today,
Though it might sound just a bit cliché.
We can build a rollercoaster, but this time with songs and dancing!
'Cause when we're back in school come next September,
And they ask us, we can both remember
Every cool and clever thing we did all summer long, and glancing
Back we're gonna be so glad that we
Didn't sit all day and watch TV,
I don't think anyone can disagree
The world is possibilities
And that's what makes me say:
Phineas and Chorus: Hey Ferb! Phineas: Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today!...
Phineas and Chorus: Hey Ferb!
Background singers: Boredom is something up with which I will not put

Phineas: Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today!...
Phineas and Chorus: Hey Ferb!
Phineas: Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today!...
Background singers: Boredom is something up with which I will not put
Phineas and Chorus: Hey Ferb!
Phineas: Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today
Hey Ferb, I know what we're gonna do today!
Hey Ferb!