The lyrics that I still remember go something like this...
Do do do do do you know what happened at the zoo?
What happened at the zoo?
What happened at the zoo?
Do do do do do you know what happened at the zoo?
It really really really did come true!
The giraffe is laughing, ha ha ha
Yes indeed he's laughing,ha ha ha
Yesterday he started laughing, ha ha ha
And now he's laughing more and more
He never made a sound before
But now he's laughing more and more