Drama teacher Elaine Curry's down-to-earth idea of the flying wizard game from Harry Potter has taken her Welsh school by storm.
Instead of broomsticks, it's played with hula hoops and tennis rackets.
The golden snitches are there but they're hidden on players.
It's so popular hundreds of pupils have signed up for the league at Newtown High School, Powys, mid-Wales.
Now Mrs Curry's struck gold as Warner Brothers who make the Potter movies say she can sell her version to the rest of the world.
She said she only dreamed it up as a "bit of fun" and it took a few weeks to work out the rules.
So maybe one day you'll be able to compete for an inter-school Quidditch cup!