The Weasley Twins

Only three owls each,
but priceless brains
which thought of brilliant stuff,
which was looked upon with disdain.
From their scornful mother
cunningly hid,
so she does not of all
their creations get rid.
Basic Blaze Boxes and Deflagration Deluxe
would easily drive Dr. Filibuster out of a job.
Fever Fudge, Blood Blisterpod and others
that teachers of their students rob.
Clever concoctions and
sarcastic, humourous minds
endeavouring and achieving knowledge
of Hogwarts most secret finds.
Mischief they do make,
for that is their calling;
And numerous times in the day
does the bell of their shop ring.
Oh! It's another customer
who winded his way through Diagon Alley
just to find some Nosebleed Nougats
which are all sold out, sadly.