Karen is informed by owl that she's a prefect. She writes her friends about that, of course.
They are not prefects, but are pleased for her!
He scrapes enough money together for the test of the wards on a few square meters outside the house. Voltaic piles work as desired. He spends the rest of the summer camped out there experimenting.
She might notice that Minor is vaguely chattier around her and spends more time staring at her.
She snorts and goes back to rearranging his magnetite and amber, erstwhile Christmas presents and now experimental tools.
He is so, so ecstatically happy. And very annoyed when term starts and he has to abandon it for Hogwarts, where none of his experiments will work.
"I feel like at this point I can make as much progress at home if I'm willing to frequently bother Michael and Timothy. I am looking forward to seeing my friends more, though."
And Miranda has a funny story about how she now has lots of practice at the charms for healing electrocution.
"I couldn't switch to gloves halfway through the experiment without compromising the scientific integrity of the results!"
"In a hundred years when electricity is really important you'll agree with me it was worth it!"
"I guess I could've thought of gloves in advance." He sighs and shakes his head. "O.W.L.s year. Michael says school went by really fast for him but I'm not really seeing it."
"Yeah, it feels like a long time ago we were in first year - d'you think we'd be friends if I hadn't come into your compartment?"
"I didn't even meet her on the train to begin with - I guess we could've met through her, yeah."