(Song: "Serious Fun") Chorus: ♪ Doo-doo-doo-doo ♪ ♪ Doo-doo, doo-doo-doo... ♪ Phineas: ♪ Get out your tool case, ♪ ♪ Put on your game face. ♪ ♪ Get out your brushes, gonna paint this town. ♪ Phineas and Chorus: ♪ Let's just get rockin', no time for talkin', ♪ ♪ Just fourteen hours 'till the sun goes down. ♪ Phineas: ♪ We've got one last day of summer, ♪ ♪ One more day before school has begun, ♪ Phineas and Chorus: ♪ One last day in the sun, ♪ ♪ Let's have some serious fun! ♪ Chorus: ♪ Doo-doo-doo-doo ♪ ♪ Doo-doo, doo-doo-doo... ♪ Chorus: ♪ Doo-doo, doo-doo ♪ ♪ Doo-doo... ♪