On the weekends he goes and hangs out with Theodore, who adores Care of Magical Creatures and has, apparently, found a third thing to be good at alongside flying and Herbology. 'animals' isn't a very useful thing to be good at but Theodore's blissfully happy so Minor doesn't say that.
Theodore gets along fine with Fredrick the not-a-cousin in Gryffindor and in his year. Minor shoots Fredrick double the scathing glares to make up for it.
The letters he writes his father are really really long. His father does not think Hogwarts provides a remotely satisfactory education, and actually considered not sending Timothy, but Timothy begged and pleaded and wheedled and was Timothy and so of course got exactly what he wanted, which was Hogwarts and then an endless flood of letters constituting what their father considered a real magical education. He writes back answers that are just as long, and he makes sure he's not cheating by having big loopy handwriting. Pages and pages of tiny writing, and the return letters come as fast as the owls fly, which means his father must be dropping everything to answer them, which makes him feel warm and joyous and glowy inside.
Quidditch teams start training for the season. Michael likes a girl on the Slytherin Quidditch team and therefore goes to all their practices and leans against the stands and sings. Michael has a fairly miraculous voice and starts regularly attracting a sort of crowd. Minor goes, sometimes, because Michael singing has the same air about him as Father inventing, the air of a person so thoroughly in their element that the world cannot move them at all.