Hmm, I don't see a "Playing the Game" thread yet either. So...
To Morgan- "The Ministry of Accidental Magical Reversal? That's me Mum's department. She just got her old job back this summer. I wonder if she knows your friend Black. Heh, small world innit?"
"And as for 'ow they knew you two were wizards- that's easy! You don't think all those standing stones, Stone'enge an the like, are just for the tourists, do ya? They're "Magic Detectors"! An whenever there's a "disturbance in the force" or whatever, some tuned in Psychic up in the Ministry twigs to it, and they send a team out- folks like me Mum or your Mr. Black, to go see 'oos doin' wot that they're not supposed to. And that's 'ow they found the two of you. See you're right- Morgan is it? -it weren't "real" magic you were doin', but it's close enough to get some spook up the Ministry's ears twitchin'. And they gotta know it's some untrained 'potential wizard' like us doin' it, jus' from the amateur feel of it probably. So they confirm it with an agent and if your the right age, they sends an owl with an invite. Afterall, can't have a loose cannon spookin' the norms with Real Magic, can they? Nah, better scoop 'em up and train 'em right, and if they can't be trained..."
Colin makes a "zapping" gesture with an imaginary wand at Basil's head, "Obliviate! And poof, you forget the whole thing. Ooo, I can't wait to learn that charm myself!" He imitates an older man's voice- "Hey there, what are you doing back in the secret records department?" Makes "zap" gesture again, and then in his own voice- "Obliviate! And then I run past him and he'll just think he's seeing things and go about his business. Bein' a wizard's gonna be great!"