Full version I learned years ago..

There was an old farmer who sat on a rock
Teaching his children to play with their...
Kites and their marbles, in bold days of yore
When along came a maiden who looked like a ...
Pretty young maiden with feet like a duck
Who said she'd invented a new way to...
Educate her children to read and to write
While the boys in the farmyard were shovelling some..
Dirt and some rubbish to put on the fire
And the dirty old farmer was pulling his...
Horse from the stable to go to the hunt
And the lady of the manor was powdering her..
Nose from the vanity box
To prevent her from catching a fresh dose of..
Gout or lumbago

Another one we used to do along the same lines was..

Edinburgh Castle stands upon a rock
And if you want to pass it you've got to show your..
Cocktail Ginger Ale, half a pint of water,
Stick it up your..
Ask no questions tell no lies,
Shut your mouth and you'll catch no flies

Ah childhood innocence or what??
Giok ¦¬]