Weasley's Wizarding Wheezes: The company that will put good 'ole Fillibuster's out of business.
Weasley's Wizarding Wheezes
93 Diagon Alley
London, England
"You'll put Dr. Filibuster out of business, no problem."
-- Harry Potter to Fred and George Weasley
Fred and George Weasley worked for several years to develop a line of comic magic items which they hoped to sell through their company, Weasley's Wizarding Wheezes. They were putting together order forms during the summer of 1994 with the hope of selling the items at school, but their mother was thoroughly digusted with the whole thing and made them throw the forms away. They were undaunted, however, and they managed to impress Ludo Bagman, the head of the Department of Magical Games and Sports, with one of their fake wands. At the end of the 1994-1995 school year, Harry Potter gave the Weasley twins a thousand galleons he had won in the Triwizard Tournament as seed money to start them with their business.
Over the 1995-1996 school year, the twins attempted to hire beta testers among the other students (they themselves always served as the first test subjects), but Hermione curtailed their use of other students as testers. They were able, however, to conduct market research, conduct further product development, and build up their customer base over the course of the school year, since their focus was on developing their new business rather than studying for N.E.W.T.s.
Some of the items we invented:
Basic Blaze Box
Canary Creams
Deflagration Deluxe
Extendible Ears
Fainting Fancy
Fever Fudge
Headless Hats
Nosebleed Nougat
Portable Swamp
Puking Pastilles
Skiving Snackbox
Ton Tongue Toffees
Fake Wands
Wildfire Whiz-Bangs
Thanks to Harry Potter Lexicon