Two real classics from Spike Milligan:

The boy stood on the burning deck
Whence all but he had fled
Twit.

I must go down to the sea again
To the lonely sea and the sky
I left my shoes and socks down there, I wonder if they're dry?

And another;

Little Miss Muffet
Sat on her tuffet
Eating her Irish stew
Along came a spider and sat down beside her
And so she ate him up too.