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What kind of shop do Harry Potter and Wesley open?

Weasley Magic Joke Shop

The joke shop opened by Fred and George. Harry gave the twins the prize money (1000 galleons) won in the Triwizard Championship, and they used the money to open this store at 93 diagon alley. In the fifth book, the products sold are Weasley whistle fireworks (simple flame box with five galleons and luxurious one with twenty galleons), canary biscuits (seven silver sykes), retractable ears (unknown price), quick-acting truant candy (including coma candy, fever candy, blood sugar with runny nose and vomit candy), headless hat (two galleons) and portable swamp (unknown price).