My Dad used to sing...
We must be ever so, ever so, quiet, Shhh, Shhh, Shhh.
Don't make a noise it will lead to a riot, Shhh, Shhh, Shhh.
Can't you hear the tick of the clock ,
dickery dickery dickery dock,
We must be ever so, ever so, ever so, ever so, ever so, ever so,
QUIET