"Well, I'll need you to come up with a better name for Water Quidditch than Water Quidditch," Terrence said, laughing. "No, imagine it, though. You could charm inner tubes - or those noodle things, you know the ones? They're made of foam. That's probably the closest you'd get to an underwater broom." He considered the idea. "The Quaffle and Bludgers could probably stay the way they are, but you'd have to reinvent the Snitch. Make it a swimmer, rather than a flier."
He grinned. "Or if you're just playing Water Quidditch until your arm's better, to get your arm better, you could leave the Snitch and the Seekers out entirely."