Four brisk lines in which a yellow-billed bird lands on the windowsill and scolds a "sleepy-head" for still being in bed. Short enough to say from memory, it makes a cheerful morning counterpart to Stevenson's bedtime poems, best read at the actual moment of waking a child up.
From A Child's Garden of Verses. See the whole collection.
A birdie with a yellow bill
Hopped upon the window sill,
Cocked his shining eye and said:
"Ain't you 'shamed, you sleepy-head!"
Public domain. Text from A Child's Garden of Verses (Robert Louis Stevenson, 1885), via Project Gutenberg. View the source edition