Big Bird: I have a little song.
It isn't very long.
(missing lines)

(Scene changes to show Bob, wearing an old-fashioned boy's costume with straw hat.)

Bob (speaking): Jack and Jill went up the hill to fetch a pail of water. (A lot of water splashes on him.)

(Scene changes to show Bob in ordinary outfit, at Oscar's can.)

Bob (singing): You go to visit Oscar. You knock upon his can.
(Knocks, lid opens and someone says:)

Unidentified voice (speaking): Oscar isn't in!

(Scene changes to Maria and a human baker.)

Maria (singing): You go to see a baker.
He's making custard pies.
You ask if you can have one, and the baker yells:

Baker (holds up a pie): Surprise! (Ready to throw it in her face)

Maria (holds up another pie and throws it in his face first): Surprise!

Chorus: Surprise, surprise, surprise!

(Scene changes to show Bob, wearing Jack and Jill costume.)

Bob (speaking): Mary had a little lamb. Its fleece was white as snow. (A bunch of snow dumps on him.)

(Scene changes to someone who looks out window and sees Grover hanging from a pole.)

Grover: I don't know how I got here.
(missing lines)
I'm in for a ... (loses his grip and yells as he falls)
SURPRIIIIIISSSSSSEEEEE!

(Scene changes to show Big Bird, sadly walking down Sesame Street.)

Big Bird (singing): Today it is your birthday, you're feeling kind of rotten,
Seems all your friends and relatives - they somehow have forgotten,
You're feeling sad and lonely when, right before your eyes,
All your friends and relatives jump out and yell "SURPRISE!"

Maria: We knew it was your birthday.

Mister Hooper (holding up a sweater): I hope this is your size.

(I don't know the rest, but I'm pretty sure it ends with "Surprise!")