A tidy little verse comparing a schoolroom clock's two hands to keeping a clean face and doing what's right. More gentle moral than nonsense rhyme, and a natural way into talking about clocks.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
There's a neat little clock,—
In the schoolroom it stands,—
And it points to the time
With its two little hands.
And may we, like the clock,
Keep a face clean and bright,
With hands ever ready
To do what is right.
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition