Hey, diddle, diddle

Hey, diddle, diddle,
The cat and the fiddle,
The cow jumped over the moon.
The little dog laughed
To see such sport,
And the dish ran away with the spoon.

I love this one too:

A cat came fiddling out of a barn

A cat came fiddling out of a barn,
With a pair of bagpipes under her arm.
She could sing nothing but fiddle dee dee,
The mouse has married the bumblebee.
Pipe, cat; dance, mouse;
We'll have a wedding at our good house.