I liked this one a lot:

Old Mother Hubbard
Went to the cupboard
To fetch her poor dog a bone,
But when she got there,
The cupboard was bare,
So she threw it out the window,
The window, the sixteenth-story window,
the window, the window, the sixteenth-story window.


Jack be nimble,
Jack be quick
Jack jumped over the candlestick-
And fe-ell out the window,
The window, the sixteenth-story window,
the window, the window, the sixteenth-story window.

Little Bo Peep
Has lost her sheep,
And doesn’t know where to find them;
But leave them alone,
When they come home,
She’ll throw them out the window,
The window, the sixteenth-story window,
the window, the window, the sixteenth-story window.

Little Miss Muffet
Sat on a tuffet,
Eating her curds and whey;
When along came a spider,
Who sat right down beside her,
She threw it out the window,
The window, the sixteenth-story window,
the window, the window, the sixteenth-story window.

Jack and Jill
Went up the hill
To fetch a pail of water;
Jack fell down
And broke his crown,
And threw it out the window,
The window, the sixteenth-story window,
the window, the window, the sixteenth-story window.

You can just keep going on like that, a lot of nursery ryhmes will fit into the pattern, just pick any rhyme and stick it in there: Old King Cole, Peter Peter Pumkin Eater, Jack Horner, and etc all will fit in)